Wan Mohamed Salleh, W. N., Che Ahmad, C. N., & Setyaningsih, E. (2021). Difficult topics in Biology from the view point of students and teachers based on KBSM implementation. EDUCATUM Journal of Science, Mathematics and Technology, 8(1), 49–56. https://doi.org/10.37134/ejsmt.vol8.1.6.2021