This study aims to investigate how primary school students' three-dimensional geometric thinking changes across grades. The survey model was used, and the study group was comprising of 520 primary school students in a large city of Turkey. In the study, the Three-Dimensional Geometric Thinking Test, which is a paper and pencil test, was used to…

The purpose of this study is to determine the mental models of primary school students about the concept of environment. The research group consisted of 400 students, 219 girls and 181 boys, enrolling to the 3rd and 4th grade in a primary school located in Istanbul. The students were asked to draw the environment and explain the items they draw.…

The purpose of this study is to explore the children's understanding of moon phase changes. Study methods include qualitative and quantitative methods. The subjects of the study are 683 students from grade three to six in an elementary school in New Taipei City. This study uses the method of writing assessment to explore the ideas of elementary…

In this research, it is aimed to explore how students are able to define parallelogram and to establish relations with other quadrilaterals at each class level comparatively. Case study is chosen as the methodology of this study and the participants of the study are 120 middle school students from a state middle school in Turkey. Two open-ended…

This study is an attempt to examine science teachers' views on Argumentation-Based Science Learning (ABSL) and the activities they have prepared. The study employed a qualitative case study method. The working group consisted of 5 science teachers who work in secondary schools affiliated with the Ministry of National Education in Turkey and who…

In this study, it was aimed to reveal the ideas of the secondary sixth and eighth grade students about the concept of decimal via mental images. Moreover, within the scope of this study, the differences between the mental images of the sixth and eighth grade students about the concept of decimal number will be investigated according to their class…

The present study aimed to investigate how history of mathematics was integrated to some mathematics textbooks in Turkey. On this account, four different textbooks with different grade levels were chosen. In total, 42 cases were detected and studied by three researchers. Results indicated that the usage of history of mathematics was materialized…