Kanyesigye ST, Uwamahoro J, Kemeza I. The Effect of Professional Training on In-service Secondary School Physics ’Teachers’ Motivation to Use Problem-Based Learning. IJLTER [Internet]. 2022 Aug. 30 [cited 2026 Apr. 30];21(8):271-87. Available from: http://www.ijlter.net/index.php/ijlter/article/view/1393