Adewumi GS, Akanbi AA, Muraina KO. Effect of Two Instructional Strategies on Students’ Achievement at Selected Abstract Concepts : A Case Study on Biology Learning in Kwara State, Nigeria . JPES [Internet]. 2024 Apr. 6 [cited 2024 Jul. 1];3(02):140-51. Available from: https://journal.iistr.org/index.php/JPES/article/view/529