Al-Zahrani, Ali Hassan, Thamer Nawaf Alnefaei, Ayed Faihan Al Nafaie, Fayez Abdullah Al-Haifani, Hatem Hussein Al-Thubaiti, Abdul Rahman Saleh Al-Ghamdi, and Emad Ali Al-Ghamdi. 2018. “Problems of Quality of Biology Education and Chemistry in Public and Private Schools in Taif Governorate, Saudi Arabia”. Journal of Educational and Psychological Sciences 2 (9): 66-52. https://doi.org/10.26389/AJSRP.T141217.