Kaseke NF, Macharia S. An Investigation of Concept Attainment Model on Learning Achievement in Biology in Public Secondary Schools in Kibwezi sub-County, Kenya. theijbm [Internet]. 2017 Aug. 31 [cited 2024 Jul. 22];5(8). Available from: https://internationaljournalcorner.com/index.php/theijbm/article/view/124470