BOZKURT, H. and ÖZMUSUL, B. 2021. Investigation of Activities in Primary School Mathematics Course Book According to the Intellectual Development Principles. ISPEC International Journal of Social Sciences & Humanities. 5, 2 (Jun. 2021), 129–143. DOI:https://doi.org/10.46291/ISPECIJSSHvol5iss2pp129-143.