Effects of Heuristic and Jigsaw Strategies on Performance and Retention in Islamic Studies Concept among Secondary School Students in Kaduna State, Nigeria. foefujs [Internet]. 2025 Sep. 19 [cited 2026 Mar. 2];5(4):225-34. Available from: https://js.foefugusau.com.ng/index.php/foefujs/article/view/132