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The purpose of this research is to analyze the understanding factorial concept processes of 7th grade students who have low academic achievements with Pirie-Kieren theory. The research participants are composed of two 7th grade students who are studying at a public primary school in the Inegol Province of the city of Bursa. This research has been designed according to case study design since it was carried out with two students who had low academic achievements in a constructive learning environment. The research participants were selected among voluntary students by considering their mathematics achievement test scores and their grades stated in the previous year' reports. Mathematics achievement test was composed of 15 questions that were covering pre-cognitive knowledge of the factorial concept. Educational games, group work, puzzles, worksheets and activities designed for the objectives in the factorial concept were used in the research. The data of the research was collected by through a semi-structured interview, participant observation and document analysis for each student in the study group. The obtained data was analyzed by using a descriptive analysis method. According to the findings, students who have low academic achievements were able to construct concepts difficulty by interpreting activities and they reached formalising level according to Pirie and Kieren theory. In the light of the findings of this study, the researchers have developed suggestions. (C) 2015 The Authors. Published by Elsevier Ltd.

The aim of this study is to analyze the role of meta-cognition while solving indefinite integral problems. In this study, there are particularly three objectives to be obtained. These are; i) observe meta-cognitive behaviors of prospective mathematics teachers while solving problems, ii) determine the importance of meta-cognition in problem solving and iii) determine challenges, typical errors and points to be considered for solving indefinite integral problems. The study is a qualitative research. Data collection tools are; i) Problems Form (PF) and ii) Meta-Cognitive Skills Questionnaire (MSQ). In this context, this study was completed by 60 prospective mathematics teachers. All prospective mathematics teachers are sophomore students at a university. Data collection tools were filled by the prospective mathematics teachers in 50 minutes. Collected data were analyzed descriptively. The analysis of the problem which were solved by the prospective mathematics teachers and the examination of completed questionnaires are to provide an understanding for the meta-cognitive aspects of solving indefinite integral problems. In conclusion, the challenges faced by prospective mathematics teachers that are subject to recall, choose incorrect solution and not knowing where to start in problem solving. The common mistakes are incorrect solutions and calculation errors. On the other hand, the point that should be considered in the problem solving is to choose a strategy. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of Academic World Education and Research Center.

Problem posing means either posing new problem situations in terms of given conditions or re-formulating an already written problem. In this study, the aim is to evaluate problems written by prospective mathematics teachers about ratio and proportion subjects in terms of criteria specified according to problem posing methods. According to this purpose, 'Problem Posing Form about Ratio and Proportion Subject' including questions for determining the tasks of free problem posing, semi-structured problem posing, structured problem posing and for determining which one is the most challenging problem posing task, was developed by the researchers. The data form was applied to 45 sophomore students who are studying in Kocaeli University, Teaching Primary School Mathematics department. The data collected throughout this study was evaluated by considering; i) Problem text (language and expression), ii) The compatibility of the problem with the mathematical principles, iii) The type/structure of the problem and iv) The solvability of the problem. In conclusion, it was concluded that prospective mathematics teachers posed clear and understandable problems which are compatible with the mathematical principles in the form of activity and which can be solved by students. The challenging sides of problem posing appeared as the hesitation on posing problems which are suitable to students' levels, the difficulty in remembering the subject clearly and not having sufficient information about problem posing. (C) 2015 The Authors. Published by Elsevier Ltd.

The main purpose of this study is to reveal the thoughts that prospective teachers studying at the department of teaching mathematics at primary schools possess with respect to the concept of 'Mathematics' through metaphors. The study was carried out with 106 female and 44 male students, total of 150 prospective teachers, who study at Kocaeli University Educational Faculty, Department of Teaching Mathematics at Primary Schools, during the fall semester in the 2011-2012 academic year. The data for the study was obtained by having students complete the blanks in the sentence 'Mathematics is like .......; Because .......'. The study had a descriptive nature, since it is an attempt to reveal an existing situation as it is. The metaphors developed by the participant prospective teachers on the concept of 'mathematics' were analyzed and interpreted by using qualitative research methods under the positive, negative and conceptual categories. In this context, the perceptions of prospective teachers studying at the department of teaching mathematics at primary schools regarding the concept of mathematics provide different perspectives. (C) 2012 Published by Elsevier Ltd. Selection and/or peer review under responsibility of Prof. Dr. Huseyin Uzunboylu

The purpose of this research is to investigate the number sense of 5th grade Turkish students on the topic of decimal numbers. The research participants are composed of 121 5th grade students from two different elementary schools.. All of the students have already completed the 5th grade mathematics curriculum. The data of the research was collected by number sense test about decimal numbers (NSTDN). It contained 16 questions and four components of number sense. The results of this quantitatively analysed research have shown that the 5th grade students' number sense on decimal numbers is low. There was no significant difference in number sense between the genders. These findings are consistent with the previous researches. (C) 2012 Published by Elsevier Ltd. Selection and/or peer review under responsibility of Prof. Dr. Huseyin Uzunboylu

The purpose of this study is to analyze the 6th Grade primary students' solving word problem skills that require extraneous knowledge. With this purpose in mind, 109 6th grade primary students from a primary school in Istanbul attended this research. Two types of test were used in this research. In the first test, the students were asked five word problems but in the second test an unnecessary data which was not necessary to solve these problems were added. The scores which were taken from tests which were carried out a week apart were compared by using paired-sampling t-test. The results of the research reveal the fact which is supported by the literature that students cannot distinguish that the extraneous information is not necessary for solving the problem and as a result they became less successful in solving extraneous problems than normal problems. (C) 2011 Published by Elsevier Ltd.

The purpose of this research is to investigate whether teaching Algebraic Expressions and Equations topic with concept cartoons has impact on students' logical thinking abilities. The research is quasi-experimental study and it was conducted with 92 students in the 7(th) grade in a primary school in Istanbul in 2008-2009 academic years. One experimental group and one control group were used. While the topic Algebraic Expressions and Equations was instructed through from textbook in the control group, it was instructed with concept cartoons in the experimental group. The data gathered through The Logical Thinking Test used before and after the research were assessed through statistical analysis method. While there is a meaningful difference in the pre- and post-tests of the experimental group and control group supporting post-tests in the end of the study, there is no statistically meaningful difference between the post-tests of the groups. (c) 2010 Elsevier Ltd. All rights reserved.

The purpose of this research is to investigate the existence of The Effect of Instruction of Integers Subject with Cartoons on Students' Mathematics Anxiety. Research consists of a semi-experimental study which was performed on 61 students during 2007-2008. These students were in their 7(th) year of primary education in the city of Bolu. An experiment and a control group were used in the research. While acquisition of Integers was handled with traditional methods in control group, it was handled with the use of cartoons in the experiment group. The data acquired with The Mathematics Anxiety Rating Scale, which is used before and after the research, was evaluated with statistical analysis method. According to the acquired data, results showed that instructions accompanied with cartoons lessened students' mathematics anxiety than traditional instructional methods. (C) 2010 Elsevier Ltd. All rights reserved.

The purpose of this study is to analyze the role of meta-cognition while solving function problems and to develop suggestions for classroom practice. Especially, the first of three objectives to be attained is to monitor meta-cognitive behaviors of prospective teachers, who study at the department of teaching mathematics at primary schools, while solving problems; the second is to evaluate the importance of meta-cognition in solving problems; and the third is to analyze typical errors, challenges, successes and strategies chosen for solving function problems. The analysis of the questionnaires filled out by students, as well as students' solutions related to the problems, provide an understanding for the meta-cognitive aspects of solving function problems. (C) 2012 Published by Elsevier Ltd. Selection and/or peer review under responsibility of Prof. Dr. Huseyin Uzunboylu

Mathematics self-concept, which can be defined as student ratings of their skills, ability; enjoyment and interest in mathematics, is seen as an important factor in mathematics education. In this context, the purpose of this study was to investigate the elementary school students' mathematics self-concept levels regarding their grade level and gender. Relational survey method was used in this study. The research sample were composed of 281 students, determined by randomly from in a primary and a secondary school in Istanbul in the spring term of 2013-2014 academic year. Data were collected using the Self-Description Questionnaire-I developed by Marsh (1992) and adapted into Turkish by Yildiz and Per (2008). Analysis of variance (One-way ANOVA) and independent sample t-test were employed to analyze data. The results of the analyses indicate that there is a statistically significant difference between elementary school students' mathematics self-concept levels based on their grade levels. Furthermore, there was a significant difference in elementary school students' mathematics self-concept levels points of view gender. In the light of the findings of this study, the researchers have developed suggestions. (C) 2014 The Authors. Published by Elsevier Ltd.