Chola, J., & Shumba, O. (2016). Impact of the BSCS 5Es Model on Zambian Grade 11 Learners’ Comprehension and Attitudes on Acid-Base Concepts in Chemistry 5070. International Journal of Physics and Chemistry Education, 8(1), 25–35. Retrieved from https://www.ijpce.org/index.php/IJPCE/article/view/34