Abstract
The aim of this study is to determine the effect of the virtual manipulative set (called MATMAP) developed for the subjects tackled in the study on students' achievement in mathematics lesson and attitudes towards geometry. The quasi-experimental design with pretest-posttest control group, one of the experimental research approaches, was used in the study. The study group consists of 52 students, 25 of whom are in the experimental group and 27 of whom are in the control group, studying in two 6th grade classes of a secondary school in the center of Kulu district of Konya province. The data of the research were obtained through the mathematics lesson achievement test and the attitude towards geometry scale. The dependent sample t-test was used in the analysis of the data obtained in the study within the same group, and the independent samples t-test and ANCOVA test were used in the analysis between the groups.
As a result of the analysis of the data obtained in the study, it was determined that there was a statistically significant increase in the achievement scores of both groups. When the mathematics achievements of the groups after the experimental procedure were compared, it was determined that the difference between the post-test scores of the mathematics lesson achievement corrected according to the pre-test scores was only statistically significant in favor of the experimental group. It was also determined that the experimental group students developed statistically more positive attitudes towards geometry than the control group students. At the end of the study, suggestions were made based on the research results and on the design of similar materials to be developed in the future. As a result of the analysis of the data obtained in the study, it was determined that there was a statistically significant increase in the achievement scores of both groups. When the mathematics achievement posttest scores of the groups were compared, it was determined that the experimental group students were statistically more successful than the control group students. It was also determined that the experimental group students developed statistically more positive attitudes towards geometry than the control group students. At the end of the study, suggestions were made based on the research results and on the design of similar materials to be developed in the future.