Prof. Dr. Saeed Hussein Ali, Assist. Prof. Amna Kazem Murad and Alia Omran Khudair 2020. The Effectiveness of Teaching According to The Logical Thinking Skills in The Scientific Achievement of The Fourth Graders in The Subject of Chemistry. Journal of Arts, Literature, Humanities and Social Sciences. 59 (Oct. 2020), 349-359. DOI:https://doi.org/10.33193/JALHSS.59.2020.292.