@article{article_1704451, title={The Effect of Cognitive Development Programme (Turkish Maths/ Math Modules) on the Development of Mathematics Skills of Primary School Students}, journal={Osmangazi Journal of Educational Research}, volume={12}, pages={84–107}, year={2025}, DOI={10.59409/ojer.1704451}, author={Erkaya, Ayşe and Yıldız Demirtaş, Vesile}, keywords={The PASS theory, Turkish Maths, Math Modules, mathematics skills, quasi-experimental design.}, abstract={This study was conducted to determine the effects of the Turkish Maths (Math Modules) cognitive development programme based on the PASS Theory on the mathematics skills of first grade students. In the study, unequal groups pretest-posttest experimental design, one of the quasi-experimental designs, was used. The study group consisted of 39 typically developing students attending 1st grade. The measurement tools to determine the effectiveness were the calculation performance test (De Vos, 1992; Olkun et al., 2013) and the number sense test for kindergarten and primary school students (Palabıyık & Tertemiz, 2021) developed for the first grade. To ensure social validity, semi-structured interviews were conducted with the class teacher of the experimental group and 9 parents. The quantitative data obtained were analysed manually through SPSS 27.00 package programme, and the social validity data were analysed manually through content analysis. As a result of the intervention; according to the Mann-Whitney U test results of the experimental group students and the control group students; it was determined that there was a significant difference between the scores obtained from the calculation performance test (U=99.00, p= .015 <.05) and the number sense test (U=20.50, p= .001 <.05). According to the social validity findings, each interviewee stated that the programme was beneficial for the children and the differences were observable. In line with the quantitative results and social validity findings, it is thought that the Turkish Maths (Math Modules) cognitive development programme is effective on first grade students in improving their mathematics skills.}, number={1}, publisher={Eskişehir Osmangazi University}