The Effect of Cognitive Development Programme (Turkish Maths/ Math Modules) on the Development of Mathematics Skills of Primary School Students

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