European Journal of Education Studies
ISSN: 2501 - 1111
ISSN-L: 2501 - 1111
Available on-line at: www.oapub.org/edu
10.5281/zenodo.193076
Special Issue - Basic and Advanced Concepts, Theories and
Methods Applicable on Modern Mathematics Education
CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’
RESPONDING TO STUDENTS’ IDEAS WHILE
TEACHING LIMIT CONCEPT
Semiha Kula Ünver1, Esra Bukova-Güzel2i
1,2
PhD, Dokuz Eylul University, Faculty of Buca Education,
Departments of Mathematics Education, ”uca, İzmir, Turkey
Abstract:
The purpose of this study was to conceptualize pre-service mathematics teachers
responding to students ideas, one of the codes of Contingency unit of Knowledge
Quartet, while teaching limit concept. The participants were four pre-service secondary
mathematics teachers. The data were obtained from the lesson plans, the video records
of the participants lessons, and the semi-structured interviews. When the data were
analysed, the seven sub-codes of the pre-service teachers responding to students ideas
were determined. These sub-codes were named as a repeating students ideas, b
approving students ideas, c explaining and expanding students ideas, d answering
students questions, e asking how students reached their ideas, f correcting mistakes
in students ideas, and g ignoring students ideas. It is thought that these sub-codes
would be helpful to examine pre-service mathematics teachers responding to students
ideas in a detail way.
Keywords: contingency; knowledge quartet; limit concept; pre-service mathematics
teachers; responding to students ideas
1. Introduction
The Knowledge Quartet (KQ) is a framework for the observation, analysis and
development of mathematics teaching, with a focus on teachers subject matter
knowledge (SMK) and pedagogical content knowledge (PCK) (Rowland, Huckstep, &
Correspondence: Dr. Esra BUKOVA GÜZEL, Associate Professor,
E-mail: esra.bukova@gmail.com, esra.bukova@deu.edu.tr.
i
Copyright © The Author(s). All Rights Reserved
Published by Open Access Publishing Group ©2015.
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
Thwaites, 2005; Rowland, Turner, Thwaites, & Huckstep, 2009). The KQ has four
dimensions-called Foundation, Transformation, Connection, and Contingency-each of
which is associated with several codes (Rowland, Huckstep, & Thwaites, 2005).
Foundation, the first unit, involves theoretical background about SMK and PCK, as well
as beliefs regarding mathematics and mathematics teaching. Transformation comprises
the ways in which knowledge can be transmitted clearly by teachers to learners, the use
of examples and selection of procedures to form concepts, and the choice of illustrations
and representations. Connection involves decisions about sequencing subjects or
lessons, associating lessons with previous lessons and with students knowledge,
associating procedures with concepts, and anticipating and carefully sequencing the
introduction of complex ideas in the lesson. Contingency, the focus of this study and
the last unit, involves unplanned examples in lessons, such as students unexpected
ideas, deviation from the lesson agenda in response to an unplanned opportunity.
Rowland, Thwaites and Jared (2011) suggested that the consideration of
contingency -including its possible triggers, consequences of such triggers, and
demands on teachers various knowledge resources- had an important but, as yet
unrecognized, place in mathematics teacher education. Mathematics teachers may not
predict contingent moments before they happen as well as student teachers. Although
the teachers plan their teaching in accordance with their insights of possible students
responses their experiences, knowledge of students, and content knowledge (Ball,
Thames, & Phelps, 2008), they may not be able to predict each student's response
(Turner, 2009). Schoenfeld (1998) handled "lesson image" as contingency. He stated that
teacher s lesson image included knowledge of students and how they may react in the
planned lesson, what students are likely to be confused about, and how the teacher
overcome these difficulties (Rowland, 2010).
Contingency deals with the situations that cannot be planned for before the
lesson (Rowland et al. 2009; Rowland, Huckstep, & Thwaites 2005). The idea that while
most situations in the classroom can be planned, some cannot, prompted the
researchers to generate this unit. Contingency also covers the ways in which teachers
respond to unplanned instances in a lesson, which often tests their ability to think on
their feet Rowland, Huckstep, & Thwaites,
. Contingency is composed of four
codes named as deviation from lesson agenda, teacher insight, responding to the
(un)availability of tools and resources, and responding to student s ideas. “ccording to
us, the 'responding to student's ideas' becomes more prominent in comparison with
other codes. As responding to student's ideas may lead to deviate from the agenda and
shape the teacher's insight, this study focused on f responding to students ideas.
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
2. Responding to Students’ Ideas
Turner (2009) suggested that it was possible to ensure more meaningful teaching by
responding to students ideas. “dditionally, teachers acquired more information about
the nature of students knowledge when they articulated an idea not to be predicted
(Thwaites, Huckstep, & Rowland 2005). To put aside such opportunities, or simply to
ignore or dismiss ideas as wrong , can be meant as a lack of interest of students ideas
(Rowland et al. 2009).
Turner (2009) used the KQ as a framework for observing, reflecting and
discussing the teaching practices of 12 pre-service mathematics teachers starting their
practices during a period of four years. She indicated that the participants exhibited
improvements in terms of responding to students' ideas by the end of the four-year
period. They effectively dealt with to students errors and used unplanned resources at
the end of this four-year. They became more proficient on understanding and
discussing of student s methods and ideas and basing their teaching by the way they
also began to adopt a more inquiry-based approach to their mathematics teaching.
Other researchers (Ball 2003; Ball & Sleep 2007; Empson & Jacobs 2008; Even &
Tirosh 1995; Graeber, 1999; Lloyd & Wilson 1998; Marks 1990; Sleep & Ball 2009; Tirosh,
Even, & Robinson 1998; Van der Valk & Broekman 1999) also emphasized the
importance of responding to students ideas. For instance, ”all
pointed out the
importance of controlling discussion and evaluating students verbal and written
responses. Schoenfeld (2006) emphasized that when an unexpected incident happened
in the lesson, the teachers would review their goals at that moment. The students ideas
such as comments, questions and answers may create unexpected situations for the
teachers, but it is considered important for them to take advantage of such
opportunities to develop their teaching. For instance, Rowland, Thwaites and Jared
(2011) examined Bishop's (2001) anecdote about a class of 9- and 10-year-olds who were
asked to give a fraction between ½ and ¾. One girl answered ⅔, explaining because
is between 1 and 3, and 3, the denominator, lies between 2 and 4. They indicated that
the girl s answer was probably not one that the teacher had expected, and the teacher
could ignore or effectively dismiss the girl s proposal or alternatively take it seriously
by trying to understand her reasoning.
A teacher's ability to give appropriate responses to student's ideas requires
primarily to listen the student's ideas and to understand them. When the teachers listen
to their students, they can shape their teaching by means of students ideas Wicks &
Janes, 2006). Despite the fact that the need to utilize the students' ideas, the researchers
showed that listening to students thinking was hard work especially when students
ideas sound and look different from teachers expectations ”all,
Morrow, 1998;
Wallach & Even, 2005 cited in Suurtamm & Vézina, 2010). Additionally, sometimes
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
teachers may ignore the students' ideas even if their ideas are appropriate for the goals
or able to contribute to the subject. For instance, teachers tended to minimize or dismiss
the students' ideas when they were not listening to them or when they do not
understand such thoughts (Cobb, 1988 cited in Davies & Walker, 2007). It is important
to listen and to understand students for responding their thoughts. Especially, effective
listening is also significant for understanding students' unexpected ideas and how these
ideas are formed. So, teachers should try to consider their students' thinking and
respond them effectively.
In this study, the pre-service mathematics teachers responding to students ideas
were examined in the context of teaching limit concept. The study focuses on limit
concept because each concept in the Calculus depends on limit and it is suggested to
teach the concepts of continuity, derivative and integral by depending on the limit
concept in National Mathematics Curriculum in Turkey. In the next part, we discussed
important points of the limit concept.
3. Limit Concept
Even though the limit concept is very important, students and teachers have difficulty
in learning or teaching this concept (Bukova, 2006). Researches (Davis & Vinner, 1986;
Orton, 1983; Williams, 1991) showed that students had some misconceptions about limit
such as seeing limit as a boundary, an approximate value, an infinite process and a
value (Blaisdell, 2012). Additionally, Thabane (1998) and Laridon (1992) expressed that
students thought the value of the function as similar to the value of the limit (Jordaan,
2005). Kula (2011) also stated that students tended to generalize the property of
polynomial functions for finding limit to all types of functions. In our country, the limit
concept was introduced in the secondary school and limit concept is taught intuitively.
It could be thought that the students had more unexpected ideas and more questions on
limit. So, the pre-service teachers may generally meet the contingent moments while
teaching limit. “dditionally, having knowledge of students ideas, errors,
misconceptions, and difficulties may reduce these moments. It was known that preservice teachers were not very well-placed to anticipate contingent moments, because
they did not reflect their theoretical knowledge about SMK and PCK in their teaching
(Rowland, Thwaites, & Jared 2011).
In this study, the mathematical content focus was the limit concept; the purpose of
the study was to conceptualize the secondary pre-service mathematics teachers
responding to students ideas occurred in contingent moments. For this purpose, the
research question was determined as How to conceptualize the pre-service
mathematics teachers responding to students ideas occurred in contingent moments
while teaching limit concept? .
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Basic and Advanced Concepts, Theories and Methods Applicable on Modern Mathematics Education
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
4. Methods
This was a qualitative case study which aimed to conceptualize the pre-service
mathematics teachers responding to students ideas and four cases were chosen to fill
code named responding to students ideas, to extend the emerging code.
4.1 Participants
The participants in the research were four (three females and one male) secondary preservice mathematics teachers. The participants were senior undergraduate students
enrolled in a secondary mathematics teacher education program. The secondary preservice mathematics teachers enrolled in a five-year program in Turkey. During the first
three years, the pre-service mathematics teachers took the courses such as Calculus,
Analytic Geometry, Discrete Mathematics, Differential Equations, Algebra, Complex
Analysis, Topology, Probability and Statistics, etc. In addition to these courses, they also
took courses such as Mathematical Modeling, Mathematical Problem Solving,
Mathematics and Art, Mathematics and Games, History of Mathematics, Mathematical
Applications with Computers, Mathematical Thinking, and New Approaches in
Mathematics. During the last two years, for preparing them to teach mathematics, they
took courses regarding both general pedagogical knowledge and PCK such as
Introduction to Educational Sciences, Curriculum Development, Assessment and
Evaluation, Classroom Management, Guidance, Teaching Methods in Mathematics,
Examination of Mathematics Textbooks. Apart from this, in the last three semesters,
there were courses related to school-based placement named School Experience I- II and
Teaching Practice. During this education process, the participants had the chance to
improve their knowledge about the limit in the Calculus I-II courses. At the same time,
in Teaching Methods in Mathematics I-II they had also chance to learn how to teach this
concept.
The participants took part in the research voluntarily and chose their pseudonym
such as Deniz, Umay, Caner and Alev. The participants had almost completed the ninth
semester in the program; therefore, they completed their course, except the last
semester. They realized their lessons about the limit within the scope of the course
School Experience II. Before teaching limit, they prepared lesson plans for four lessons.
In their class, there were approximately 11-15 students.
According to the mathematics curriculum in Turkey, the students were
introduced to the limit concept for the first time in their senior year in the secondary
school. Before teaching limit, the students thought the topics such as relation-functions,
the domain and range of functions, algebraic and transcendental functions (such as
trigonometric functions, logarithmic functions, polynomials functions etc.), and
absolute-value functions at different grades. In the national mathematics curriculum,
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
the limit concept was not defined formally and it was given as the form of limit which
was described intuitively in the literature (Bergthold, 1999; Cornu, 1991).
4.2 Data Collection
Data were obtained from the participants lesson plans for the limit concept, video
records of their sixteen lessons (four lessons per participant), and the audio records of
the semi-structured interviews (seven interviews per participant).
The participants prepared for four lesson plans before teaching limit. These plans
were taken from the participants to determine whether the participants carried out their
lesson as planned. So, it was tried to handle whether the participants
adopted/revised/changed their teaching in the direction of students ideas and the
participants approaches performed in the contingent moments. With the lesson plans,
we determined whether the cases were occurred, the participants changed their
teaching and how they changed their teachings by use of students unexpected ideas.
The participants lessons were recorded to examine the participants responding to
students ideas during their teaching. ”y these video records, it was determined the
unexpected events which they did not include in their lesson plans
The forms of semi-structured interviews were individually prepared for each
participant by considering their lesson plans and video records of their lessons. The
focus of these interviews was any relevant occurrences of contingency in lessons. We
interviewed them to understand their awareness about the contingent moment. We also
determined why this moment was occurred and finally we asked them to interpret this
moment. These interviews were made to investigate how the participants responded to
students ideas and why they were response in this way. The interviews were realized
before and after the lessons.
4.3 Data Analysis
The video records of the participants were transcribed verbatim after descriptive
synopses had been prepared. The descriptive synopses of the lessons were prepared to
use in the interviews and contained the important events of what happened in the
lessons. They were used to determine the questions which the participants would be
asked in the interviews after their lessons. The participants lessons were watched two
or three times. For verbatim transcriptions, a format was determined. It included the
words of the participants and their students, the screenshots of the presentations and
videos of participants, and the statements that the participants and the students wrote
on the board. The voice records of the interviews were also transcribed verbatim. These
transcripts were used to support the findings related to responding to students ideas.
When the data were analyzed, the researchers firstly familiarized with the data at
hand while transcribing the video of the lessons and secondly with re-watching and reEuropean Journal of Education Studies - Special Issue
Basic and Advanced Concepts, Theories and Methods Applicable on Modern Mathematics Education
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
listening them. The videotaped lessons aspects of participants actions in the classroom
related to responses to students ideas were identified. The transcripts of videos were
analyzed, started by the first lesson s transcript, line-by-line via open coding with a goal
to generate categories and their properties (Corbin & Strauss, 1990). A new sub-code
was generated whenever a pattern in the data were identified. Throughout the analysis
process, the sub-codes to each other to observe similarities and differences between
them were continuously compared. Also how the sub-codes related to each other were
tried to identify.
While coding process, it was constantly compared the incident with previously
coded incidents in the same and different categories, as well as continually compared
the generated categories to each other to understand the relations between them. While
generating sub-codes, the transcriptions of each lesson were reviewed many times.
They were examined in terms of whether the teachers responded to the students ideas
or not; the cases in which the participants did or did not show interest in these ideas etc.
were determined, and sub-codes relating to these cases were formed and appropriately
named reflecting the context.
5. Results
“t the end of the data analysis, when responding to students ideas, the pre-service
mathematics teachers used the seven different ways of responses. These sub-codes of
responding to students ideas were a repeating students ideas, b approving
students ideas, c explaining and expanding students ideas, d answering students
questions, e asking how students reached their ideas, f correcting mistakes in
students ideas, and g ignoring students ideas.
5.1 Repeating students’ ideas
In this sub-code, the students ideas such as answers of a question, inferences,
interpretations, and explanations were repeated verbatim. The students ideas thought
they were true were generally repeated but rarely the students incorrect ideas,
misinterpretations, incorrect answers and incorrect inferences related to the
mathematical concepts were also repeated. While repeating students ideas, the
participants did not add anything and did not ask questions related to what they think.
The participants tried to give the impression that they were interested in what was said.
But in some cases, they repeated the inadequate or incorrect explanations. The
inadequate or incorrect explanations repeated sometimes for attracting students
attention providing opportunities for students to think one more time. However,
sometimes the participants repeated students ideas without evaluating whether the
ideas are true or not. For instance, Umay repeated the one student s expressions related
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
to the increasing in the negative direction which were mathematically wrong in her
fourth lesson.
Slide:
Umay:
What is that? It means x decreases without bound.
Student: Hmm, yes. It is increasing in the negative direction.
Umay:
Yes, we can say that it is increasing in the negative direction.
What can we say about the function?
Umay repeated her student s wrong expression about minus infinity stating as it
is increasing in the negative direction without paying attention to the mathematical
correctness. Actually, her first expression about minus infinity was mathematically true.
”ut she made a mistake while repeating the student s ideas. Her approach could cause
to problems about sequencing in real numbers. In her fourth lesson s interview, she
stated the following:
“ctually, now, when you asked, I realized the mistake of the student s
expressions. Sometimes, I spontaneously repeated my students responses without
evaluating. (Umay-Interview after the fourth lesson)
5.2 Approving students’ ideas
“nother way to responding students ideas was approving students expressions. The
students ideas were approved to show them that their thoughts were correct, they were
listened or to encourage them to continue their actions. The terms such as yes , ok ,
and that s true were commonly used to approve students ideas. Sometimes the
approvals were done through mimics or body language (such as nod). Umay asked her
students what the � = �� � � + ��− � �− + ⋯ + � � + � polynomial function s limit
was at ±∞. She called one student to the board and followed him while solving the
problem. She approved his solution steps and showed that she was following him and
also encouraged him to continue as seen in her fourth lesson.
Board:
Student: Here when n is an odd number an can be positive or negative or
when n is an even number an can be positive or negative.
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
Umay:
Yes (She shakes her head).
Student: � � is odd and an is positive lim � � . �� will be minus infinity. If an
Umay:
�→−∞
is negative then it will be plus infinity.
Yes.
Umay approved her student step by step while he was explaining his ideas. In
the fourth lesson s interview, she explained the reason of approving as follows:
Sometimes, the student on the board wrote slowly because she/he did not be sure
about their solution. I mean, whether what he/she do is true or not. And doing that,
continuously they turned back and looked at me and her/his friends. For that moment, I
feel that they needed approving. And, when I approved them, they relaxed and were
more willing to continue. Actually, I tried to approve them whenever I felt. Not only
their solutions on the board but also anywhere they expressed their thoughts. (UmayInterview after the fourth lesson)
5.3 Explaining and expanding students’ ideas
This sub-code was on explaining and expanding on students ideas. By explaining and
expanding the students ideas teachers enabled students understand what it was
thought, why it was thought this way, how this idea came up, what this idea was
related with, and what other ideas lead to this idea, how this idea could be enlarged by
considering different conditions etc. So, other students could be understood one
student s ideas. Also, this encouraged other students think based on the idea. By
explaining students ideas, some possible missing points for other students could also
be fixed. When the student on the board did not explain his/her solutions or when it
was intended to explain the solutions step by step, the participants explained these
solutions to whole class. They also expanded the students solutions and ideas by
giving related properties and mathematical rules or by discussing underlying reasons of
these solutions.
Alev gave students a piecewise function and its graph. She asked the students
what they thought about the limit of this function when � = . She explained the
student s comment to others by expanding on it.
Slide:
Alev:
What can be said here? About the limit when x is going to 4
Student: There is limit if we find the same value when approached from left
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
Alev:
and right.
Yes. We use different functions rules while investigating from the
left and right hand limit, don t we? ”ecause our function is a
piecewise function. So, we have to select the valid rule of a function
according to the given range.
5.4 Answering students’ questions
The students asked questions while they were expressing what they thought. This subcode covered the responses given to the students questions. Sometimes the teacher
gave answer by himself/herself and sometimes the teacher enabled students find the
answer by themselves. Several directive questions were asked for students to reach the
answer and students were given a chance to review their opinions and improve them.
In addition to this, some answers were given based on mathematical rules. On the other
hand, sometimes the participants answered their students questions without reasoning
because it was intended to quickly.
Deniz introduced the properties of the limit concept in her second lesson. She
first taught the properties of addition, subtraction and multiplication. Then, one student
asked her whether division had a similar characteristic or not. Deniz paid attention to
her student s question and tried to answer it.
Slide:
Student: Does the same thing happen in division?
Deniz:
Let s see if it does. This time we say
instead of
�
� here. That
is similar to multiplication. So it is similar to multiplication. If we
multiply
(
� ≠
�
with f(x) we get this equation. Ok then why I gave
��� lim
�→�
� ≠ ) condition at the beginning?
Student: Because it is indefinable.
Deniz:
Because if these conditions are not provided division is
indefinable.
In another part of her lesson, Deniz asked her students to find the limit of the
functions at � = by using the given two different functions graphs see Figure .
Upon this questions, students said that the functions had no limit at x=2 according to
their graphs. However, Deniz said both functions had a limit at this point and the limit
value was 1. When they were not convinced about lim � = and asked the reason of
�→
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
it, she tried to convince them by saying that this was a rule, you could also find it in
your books .
Figure 1: Deniz s examples of two graphs
In the interview, this excerpt of her lesson was showed and she was asked what
she thought about her explanations. She answered the question as follows:
“s I said before, this is a case in which I don t believe myself. I think that there is
not a limit only from the right or only from the left. I mean I think that it cannot be
expressed in this way. Because it contradicts our earlier description of limit. However, I
did not know how to express this. Now if I had expressed my ideas, the students would
have been more confused. If I said I think that is it , they would also think in the same
way and this might lead them to make mistakes. So I said this. The books express it in
this way. It is accepted in this way. So it is in this way. It was more like go and learn .
It was not right but I did not know how to express it in another way because as I said, I
thought there was no such thing, and so I had this situation as I did not know how to
explain. (Deniz-Interview after the third lesson)
Caner, in his fourth lesson, when a student asked is infinity a number, or is it
the whole number line? , he tried to answer.
Student:
Caner:
Is the plus infinity used as a number or is it the whole
number line?
It is not the whole number line. Look now what am I
doing? I am drawing a graph… divided by x function, if
we draw this here.
Board:
Caner:
Now we will draw this graph, too. I drew this. As � tends
to zero, what is the limit of this?
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
Student:
Caner:
Students:
Caner:
Student:
Caner:
Student:
Caner:
Student:
Student:
Student:
Caner:
Student:
Caner:
Student:
Caner:
To infinity.
� tends to zero from the right. Then, what is the limit?
To infinity.
Does it go to plus infinity? Did we search the whole line?
No, what did we do then? We think that it will go to the
edge of the line, right?
Yes.
Or what if I search for the limit at infinity on the x line.
What does it equal to?
Limit? Or zero?
If I search the limit of this function at infinity.
Infinity.
What does it equal to?
To zero.
Does it equal to? Now if I take a point here, will it come
here? What if I take here?
Tends to zero.
More. More to here, to more and more here to what am I
tending?
To zero.
I am tending to zero, right? What I am doing here, I am
using infinity as a number, right? Actually, infinity is not
any number.
He stated that the students questions were important for developing lessons and
understanding what they really thought.
This question was a sign for me which showed that the students still had a
question mark in their minds about the concept of infinity. The lesson was interrupted
by this question. I moved away from the lesson plan and tried to answer their question.
But, I noticed the students questions because they give me some clues for their ideas. I
can use them for conducting my lessons. And then, I try to answer in an appropriate
way. (Caner-Interview after the fourth lesson)
“lev was aware of her students questions, but was not able to give correct
explanations because of her lack of knowledge about indeterminate forms of limit. For
example one student asked her Is the sum of infinity and infinity is again infinity? .
Her answer was I do not know. It should not be. “lev noted that her content
knowledge was not enough to deal with the student s questions. She also stated that
sometimes she answered the students questions without reasoning.
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
To tell the truth, I do not think that my knowledge is enough. I have many
deficiencies. Actually, I have been doing something to make up for my deficiencies; I
read things about this subject or I try to come across with different questions etc.
because I think that I have many deficiencies both in my subject matter knowledge and
teaching. (Alev-Interview before the lesson).
I had difficulty in terms of knowledge about limit. As I had not solved many
examples, I had to think about the subject for a time even though I knew the subject. I
tried to be fast in thinking. Sometimes I had to answer before thinking. I mean I felt that
I had to answer. Not to think about it for a long time in front of the students. I had this
kind of difficulty. (Alev-General interview about the lessons)
5.5 Asking how students’ reached their ideas
This sub-code was included to reveal how students reached their ideas. When the
participants interested in their students reasoning without only evaluating their results
this sub-code was revealed. To reveal underlying reasons of students ideas, the
participants asked students their reasons. It enabled to be informed about students
obstacles, misconceptions and mistakes. “t the same time, sharing students ideas with
their classmates enabled students understand each other s thought, discovered
different thought patterns and fixed their incorrect thought. There were examples of
teachers asking students how they reached their answers or why they made certain
comments. Discussion about such things could help students express themselves better,
other students could also benefit and the teacher understood their reasoning better.
In the second lesson, Deniz asked one of her students to explain how to find the
limit. So, she tried to understand the underlying reasons of her student s response.
Board:
Deniz:
Student:
Deniz:
Student:
Deniz:
Seven, why seven?
It tends to two.
Why did you put two?
As it tends to two.
But can we put two every time? Maybe the function is not
defined there.
Student: Polynomial.
Deniz:
Yes as f function is a polynomial function, we can directly put the
� value in the functions. You remember this rule, right?
Student: Already I did it.
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STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
Deniz:
Do you use this rule in other functions?
Student: Not, not in all functions, but it is polynomial function. It works in
polynomial.
In another excerpt from Deniz s lesson, she discovered that they held the
misconception of a limit being a bound that cannot be attained (Szydlik, 2000; Williams,
1989, 2001 cited in Kula 2011). In group work, Deniz asked the students to examine
whether the function which graphs were given could be limited at � = or not. Her
students thought that if the function was defined at � = � it could not be limited on
that.
Slide:
1)
3)
2)
4)
Student: In the first three graphs, if we tend to two from the left or from the
right, we tend in the same number.
Deniz:
Okay.
Student: But as the number two takes value in the first, third and fourth
graphs, it is only on two.
Deniz:
Only?
Student: On two.
Deniz:
Here (showing the second graph.) you say there is a limit. I do not
understand. Can you explain the reason one more time?
Student: Because as in the first, third and fourth graphs the function is
defined at � = and takes value, so it is not limit.
Deniz:
As it takes a value more than one.
Student: As it takes value. As it is defined.
Student: When it comes to two in the others there is a value but in the
second graph when it comes to two, the function is undefined.
Deniz
Okay (showing the first graph) here?
Student: When we tend to two there, there is also a value.
Deniz:
Is there anything you want to add? You can say something.
Student: Now we said in the first one, it can never come to 2 even though
we make it continue to the infinity. For this reason I think there is
not a limit there. When we come to two, there is a limit. When we
tend to two from the left, one goes to one. When we approach
from the right, it again goes to one. There is a limit there.
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Semiha Kula Ünver, Esra Bukova-Güzel CONCEPTUALIZING PRE-SERVICE MATHEMATICS TEACHERS’ RESPONDING TO
STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
In interview, Deniz stated that she realized her students misconceptions by
asking their reasoning and explained that she did not expect her students to develop
such kind of idea.
To what do I attribute the students reaching the solution that there was no such
limit here? “ctually, I was not expecting that they would reach this result… What did I
do to remove it? I mean to remove it first I tried to hear their ideas by showing them
more than one graph. (Deniz-Interview after the first lesson)
5.6 Correcting mistakes in students’ ideas
This sub-code dealt with correcting the mistakes in students ideas. These mistakes took
place in students solutions, answers or comments. Students solution processes were
followed and their uses of mathematical language were paid attention to and their
mistakes in both solution steps and in the use of mathematical language were corrected.
While students express interesting solution ways, they could make mistakes. By giving
feedback to students about their mistakes, misconceptions and obstacles etc., the
participants could help them to discover their mistakes. Sometimes students mistakes
were corrected immediately and sometimes further questions were asked to the
students that lead them to correct their own mistakes. Mistakes that were noticed in
students ideas through the asking how students reached their ideas were corrected in this
sub-code.
As seen in the -asking how students reached their ideas-in Deniz s lesson, when her
students gave wrong explanations, Deniz questioned their reasoning. This led her to
understand the students misconception, and in her second lesson to overcome the
misconception she gave examples from daily life.
Deniz:
Okay. Now I will give you an example, from daily life. This may
help you a little. Umm let s assume that there is a girl, okay?
Student: Is she beautiful?
Deniz
Now her beauty will become clear. Two boys like her and they
approach her. Okay?
Student: (Not understandable)
Student: Does the girl approach both of them?
Deniz:
The girl doesn t approach either of them. She doesn t know them.
Both of these boys approach her. But the girl likes another boy.
ooo
Deniz:
Now there are functions and we tend to. Now I am explaining
the point of this example. We approach to a point from the left
and right. ”ut we don t have to be the thing that we tend to.
Student: We don t have to.
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Deniz:
Student:
Deniz:
Students:
Deniz:
Student:
We don t. Yes. ”ut we can.
Then 1 can.
Umm, does 1 fit this situation?
It does.
It does. We said we don t have to. Pointing the second graph) does
this fit?
Yes.
Deniz corrected the students mistakes, as demonstrated in the extract in her
second lesson. Deniz gave the six different functions graphs to her students and asked
them to examine the limits of the functions at � = . One of her student said that the
function represented in the 4th graph has not limit at � = . When she questioned her
student s reasoning, she understood the reason of mistake. Her student reached this
reason because he thought that only the function represented in 4th graph was
decreasing.
Slide:
Deniz:
Why did you say that there is no limit in the fourth graph?
Student: Or third and fifth. As the graphs are similar. That one is different.
Deniz:
How different? What if the fourth graph was like this. What
would happen if it were like this? (as the function which represents
the 4th graph is decreasing, she draws a function on the board to make the
students understand that the mistake is related to increasing-decreasing
functions)
Student: No, not from that.
Deniz:
Why? We changed the shape, is there a problem in the function?
Student: It looks like it s decreasing.
Deniz:
Now if our values of � tends to two, wouldn t we tend like this
from this curve?
Student: ”ut what about after? It looks like it s moving away from two.
Deniz:
But we are coming to two. Look here, if the values of � come to
two…
Student: Okay. Okay then.
Deniz:
…if it tends to two this way, this also tends to two, right?
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Student: Then fourth is okay also.
Caner corrected his students mistakes in their written mathematical expressions on the
board.
Board:
(Students’ writing)
Caner: Okay. Thank you. (The student did not use the proper notation to
show that the limit of �� + 7 is equal to 9 while tending to � from
the right). Look here (showing �� + 7 = 9). There is something
missing here. We are adding the limit while tending to �
from the right. (He corrects students’ mistakes as follows)
Board:
5.7 Ignoring students’ ideas
This sub-code focused on the situations in which students ideas were not paid
attention. The students ideas, answers and comments were sometimes ignored.
Ignoring ideas occurred sometimes the students ideas were out of the context of the
subject or sometimes the teacher had not knowledge related to ideas. Sometimes the
students ideas were ignored without specifying them as true or false and sometimes,
the incorrect responses were ignored and it was not questioned the reason why the
students thought in this way.
“lev sometimes reacted to her students questions or comments negatively (e.g.
no, it is not! and then, instead of asking their reasoning, she immediately gave the
answer which she wanted to hear herself. She also pretended on occasion not to hear
answers her students gave, ignoring them completely. As can be seen in her third
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lesson, before a consensus was reached about the answer to a question, she moved on to
another one.
Slide:
Alev:
Student:
Student:
Student:
Student:
Student:
Student:
Student:
Student:
Student:
Alev:
For example, calculate these values for this function. Take your
pencils and write.
Not in 1.
1 in 2.
Not in 1.
Not in 1.
-4.
Yes, not in 1.
-4 in 1. Not in 2.
Not in 2.
Yes, not in 2.
(After 54 seconds, Alev moved to another slide without showing any
interest in these comments, even though the students couldn’t agree on
an answer) Now, what can we say about piecewise-defined
function?
The students asked Umay whether there was a relationship between recurring
decimals and limit concept. She replied to these questions superficially, without
explanation or encouragement. She did not give a clear answer, but tried to ignore
them. Umay did not always pay attention while the students were discussing a
question. One such discussion was about whether 1 divided by 0 was infinity or
undefined: Umay responded by simply stating that they were considering 1 divided by
0, and did not attempt an explanation.
Student: Can I ask something? Is
Side:
divided by
infinite?
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STUDENTS’ IDEAS WHILE TEACHING LIMIT CONCEPT
Student:
Student:
Student:
Student:
Student:
Student:
Student:
Umay:
Isn t it undefined?
Infinity.
One divided by zero.
Undefined.
Undefined.
Undefined?
If you approach from the right, it is infinity, though.
We are directly talking about one divided by zero. Yes, let s
continue, friends (He continued before answering the question is
divided by infinite? ). What did we do later? First we tended to
zero. After a time, we tended to infinity. Because we learned the
concept of infinity. How did we tend?
In the post-lesson interview, Umay explained why she did not give a clear
explanation to this question as follows:
At that moment, I could not comprehend students conversations. I hear their
voices as a humming noise. It has evolved besides me. Actually, they started to talk to
each other. And I did not add something like that to my lesson plan. This was
unexpected. I skipped this thinking that we would talk about it later. I mean I put it off.
For this reason, I didn t give any instruction or explanation. Umay-Interview after the
fourth lesson)
6. Discussion
In the study conceptualized the four pre-service mathematics teachers responses to
their students ideas, it was constituted seven sub-codes. These sub-codes were named
as a repeating students ideas, b approving students ideas, c explaining and
expanding students ideas, d answering students questions, e asking how students
reached their ideas, f correcting mistakes in students ideas, and g ignoring students
ideas.
The pre-service mathematics teachers repeated students ideas, and approved the
things they said, to show that they were listened. While repeating students ideas, the
pre-service mathematics teachers did not add anything and did not ask questions
related to what they said. Approvals were sometimes done through terms such as
yes , ok , and that s true or sometimes with mimics or body language. It could be
important that teachers approve their students ideas for students to state their ideas
easily and willingly. Bass and Ball (2000) expressed that pedagogical content knowledge
included the ability to guide the course of mathematics discussion in determining
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whose comments to include, explore, expand on, when to push students to continue,
what explanations to provide (Leavit, 2008).
When the pre-service mathematics teachers were interested in what students
were saying and doing, they would explain and expand on what they saw and heard,
thus they contributed to the understanding of others. The sub-code named as
explaining and expanding students ideas in this study was encountered as explaining
and guiding explanations in the central tasks of mathematical knowledge for teaching
proposed by Ball and Sleep (2007). Wicks and Janes (2006) named the sub-code of the
explaining and expanding students ideas as clarifying in their studies. “ccording to
them teachers made clarifying to explain their students ideas and clarifying seemed
important for re-stating of the thoughts for the benefit of other students in the class and
processing what they were saying as well as making connections.
Students sometimes asked questions while expressing what they thought. The
sub-code named answering students questions covered the responses given to
students questions. The pre-service mathematics teachers sometimes gave the correct
answer or sometimes enabled the students to find the answer by themselves.
The sub-code named asking how students ideas were reached their ideas was
occurred when the pre-service mathematics teachers interested in students reasoning.
The pre-service mathematics teachers aimed to reveal underlying reasons behind
students ideas. Similarly, Wick and Janes (2006) also stated that the thoughts and ideas
of the students were able to reveal with using questioning. “dditionally, the teacher s
use of questioning throughout the presentations helped to include all of the students in
focusing on the different ways to solve the problems (Suurtamm & Vézina, 2010). By
asking students how to reach their ideas, the pre-service mathematics teachers also
informed about their students obstacles, misconceptions and the mistakes related to
limit concept. Thus, chance to correct mistakes or deficiencies of the students ideas
would arise.
To correct mistakes, the pre-service mathematics teachers preferred students to
find their mistakes themselves, or to discuss mistakes with the others. Rowland (2008)
stated that on one occasion when a student gave a wrong answer, the teacher asked
another student to give the correct answer instead of trying to establish why the first
student made the mistake. The pre-service mathematics teachers sometimes
immediately corrected their students mistakes. Ding and Li
state that some
teachers did not care about or recognize students mistakes, and teachers who did dealt
with mistakes in different ways (Ding, 2007). Sometimes the further questions were
asked to the students that lead them to correct their own mistakes. By giving feedback
to students mistakes, misconceptions and obstacles etc., the pre-service teachers could
help them with their problems and enabled them to discover their mistakes. Suurtamm
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and Vézina (2010) also paid attention to correcting mistakes and handled student
mistakes as opportunities for learning.
Ignoring students ideas focused on the situations in which students ideas,
answers and comments were not paid attention and ignored. In this study, because of
ignoring the participants could not use opportunities. When a learner produced an
unexpected contribution, teachers usually did not entertain that response, but
continued to look for a response that would be consistent with their thoughts (Mhlolo &
Schäfer,
. Empson and Jacobs
maintained that by listening to students
strategies and explanations during problem solving, students mathematical
understanding would improve, and the teacher s mathematical knowledge would also
increase. In a similar vein, Rowland et al.
stated that the teachers paying no
attention to the students thoughts may stem from their beliefs that the students could
learn in this way, too.
7. Recommendations for practice
The following suggestions were presented on the basis of the findings:
The importance of paying attention to students ideas might be handled in
teacher education program. For this reason, the sub-codes of responding to
students ideas may be used as a frame.
The pre-service mathematics teachers could be informed about how to prepare a
detailed lesson plan by considering students possible ideas. “fter preparing
lesson plans, they could teach lessons in real classroom environment or with
microteaching.
When the pre-service mathematics teachers encounter an unexpected problem
they should deal with it in the lesson and not ignore it. If they do not overcome
the difficulty at the time, they should ask a homework about it. They also
determine` the solution themselves and deal with it in the next lesson.
The pre-service mathematics teachers could be informed that they can come
across unexpected events in their lessons like dealing with points in a subject
which could be difficult or easy for the students to comprehend, misconceptions
or questions posed by the students. It is suggested that this study which was
carried out to examine the lessons of the pre-service mathematics teachers in the
context of responding to students ideas could also be carried out for the
mathematics teachers.
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