Saja Ahmed Awad al-Hawran, M.Dr. Afrah. Yassin Mohammed 2021. Analysis of the book of Chemistry for the middle third grade according to the skills of pivotal thinking. Turkish Journal of Computer and Mathematics Education (TURCOMAT). 12, 13 (Jul. 2021), 6527–6534. DOI:https://doi.org/10.17762/turcomat.v12i13.10019.