et. al., Prof. Dr. Salem Abdullah Salman Al-Moussawi,. “Analysis of Science Book Content for Middle First Grade According to International TIMSS Standards”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 13 (June 22, 2021): 5223–5232. Accessed May 16, 2024. https://turcomat.org/index.php/turkbilmat/article/view/9709.