Ongowo, Richard OwinoKeraro, Fred NOkere, Mark O2020-11-092020-11-092011http://repository.rongovarsity.ac.ke/handle/123456789/2287enAttribution-NonCommercial-ShareAlike 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-sa/3.0/us/Concept Mapping: an interactive teaching strategy that enhances active learning and students' achievements in BiologyArticle