1.
Content Assessment of the Sciences Textbooks of Grades (1-4) in the Light of International Standards in Mathematics and Science TIMSS 2019 (Cognitive Process Dimension). jperc. 2023;20(78):186-218. Accessed January 8, 2026. https://jperc.uobaghdad.edu.iq/index.php/jperc/article/view/1607