Vaskovska O, Shkolnyi O. ON THE USE OF THE METHOD OF EXPEDIENT PROBLEMS TO ACTIVATE STUDENTS’ COGNITIVE ACTIVITY IN THE PROCESS OF TEACHING MATHEMATICS IN THE NEW UKRAINIAN SCHOOL. ФМО [Internet]. 2024 Feb. 28 [cited 2026 Jun. 6];39(1):7-13. Available from: https://www.fmo-journal.org/index.php/fmo/article/view/319