Wan Mohamed Salleh, W.N., Che Ahmad, C.N. and 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 (Apr. 2021), 49–56. DOI:https://doi.org/10.37134/ejsmt.vol8.1.6.2021.