Effects of Jigsaw and Numbered-Head-Together Instructional Strategies on Achievement and Retention in Algebraic Concept among Secondary School Students in Minna Metropolis, Niger State, Nigeria. foefujs [Internet]. 2026 Apr. 3 [cited 2026 Apr. 5];3(1):183-9. Available from: https://js.foefugusau.com.ng/index.php/foefujs/article/view/358