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This is a comprehensive study aiming to examine pre-service primary school teachers' (PPST) mathematical disposition levels in terms of various variables, and to explain the results thoroughly. It employed the explanatory sequential design among the mixed method research designs. The data were collected through Mathematics Dispositional Functions Inventory (MDFI) and semi-structured interviews. The participants consisted of 361 PPSTs in the quantitative phase, and six PPSTs in the qualitative phase. Quantitative data were analyzed with descriptive and inferential statistics, while qualitative data were analyzed with descriptive analysis. The PPSTs' mathematical disposition levels did not differ significantly in terms of grade level, high school type, area of education at high school and ability area variables; however, their scores in the attitude toward mathematics lesson factor of MDFI differed significantly in terms of area of education at high school and ability area variables. There were significant, positive, and low-level relationships between PPSTs' mathematical disposition levels and their levels of mathematics learning experience in primary, middle and high schools, and their perception level of mathematics teaching efficacy. The PPSTs' scores in attitude toward mathematics lesson factor related to ability area were consistent with their statements in the interviews. The quantitative analysis results regarding mathematics learning experience levels and mathematics teaching efficacy perception levels, defined as continuous variables, overlapped with the qualitative analysis results.

The purpose of the present research is defining the direction and level of the relationship between 8th grade students' translating among multiple representations skills and their algebraic reasoning and revealing the predictive power on algebraic reasoning. The research was conducted in accordance with relational survey model, which is a quantitative research method, and the study group consists of the total of 188 students, who studied at 8th grade in state schools. The data of the research were collected with the Translating Among Multiple Representations Test (TAMRT) and Algebraic Reasoning Evaluation Tool (ARET). Data were analysed using Pearson correlation and multiple linear regression analysis. Findings revealed that there is a significant relationship between students' translating among multiple representations skills and their algebraic reasoning (r=0.59; p<0.01). Predictive power of students' translating among multiple representations skill on their algebraic reasoning was found as 40%. According to the analysis on the each translating skill's prediction of the subscales of the algebraic reasoning, only translating to graph and table representation skills predict subscales of algebraic reasoning.

Many related studies have studied many different models in the teaching of the concept of integer, which have reported that counters failed to completely help with the understanding of the concept of and operation modeling in integers. The purpose of the present research is presenting the "opposite model", which is a quantitative model, unlike thermometer, elevator, sea level, or number line, which are directional models. Additionally, it presents solutions to the problem of learning the concept of and operations in integers through models used in teaching integers for primary school 6th grade students. Opposite model is an integer model, which is based on theory and enables the easy learning of the concept of integers and addition and subtraction operations tested with experimental study by [9]. The present research is believed to contribute students' meaningful learning of the concept and operations of integers and alternative thinking through opposite model. The present research discusses the necessity of opposite model, which is to be offered as an alternative mathematical model for teaching the concept of integers and addition-subtraction operations, in light of the findings obtained through literature review.

The present study aimed to determine views the middle school students' located a province of Turkey towards the Class Dojo education technology used in mathematic courses. A questionnaire based on expert opinions was used for the collection of research data. The participants of the study consisted of 206 students; 5th, 6th, 7th and 8th grade students who have used Class Dojo Education technology. The study is conducted survey model. Descriptive statistical methods, independent samples t test, one way analysis of variance were used for the analysis of research data.Findings of the research revealed that middle school students generally had a positive opinion on the application of Class Dojo training and that the opinions of the students did not vary according to the gender factor and that the students in the lower grades expressed more positive opinions than the students in the upper grades. As a conclusion that suggestions have been made to teacher and teacher candidates, how to use this education technology that enables classroom management to continue outside the school and pros of application.

This study investigates the relationship between eighth grade primary school students' success levels in solving equations and proportional reasoning skills. 344 eighth grade students, who were registered at various primary schools in the central districts of Konya in the 2007-2008 educational year, participated in the research. The study had a relational survey research design. The findings indicated that eighth grade students' success in solving equations and their proportional reasoning skills were highly correlated (r = 0.89). Students were most successful at finding the missing value within the proportional reasoning question types, followed by questions that required quantitative comparison and qualitative comparison. [This study is a part of the Master's thesis of the first author conducted at Selcuk University, titled "The Relationship between Eighth Grade Primary School Students' Proportional Reasoning Skills and Success in Solving Equations."] (Contains 15 tables and 1 footnote.)