Proceedings of IYSW, (2020), vol. 9, pp 235-248. Journal homepage: http://journals.sdu.edu.kz/index.php/iysw THE EFFECT OF PROJECT-BASED LEARNING ON STUDENTS’ ACHIEVEMENT IN MATHEMATICS O. Nurbavliyev 1 , S. Kaymak 2 , А. Аlmas 3 , Mbala Omar Abedi 4 1, 2, 3,4 Suleyman Demirel University, Kaskelen, Kazakhstan 1 omarbek.nurbavliyev@sdu.edu.kz, 2 serkan.kaymak@sdu.edu.kz , 3 abdullah.almas@sdu.edu.kz, 4 mbalaomar@gmail.com