This study aimed at identifying the degree to which constructivist theory principles are included in 6th, 7th, and 8th grades science textbooks in Saudi Arabia. where a content analysis tool, in light of constructivism theory, consisting of (31) sub indicators, within (12) of the constructivist theory principles. The study sample consisted of all topics included in sixth, serauth and eighth grades science textbooks for the school year 2019/2020, however analysis was limited on student's book but not teacher's guidebook, in its first part. Descriptive analytical approach was employed, The results indicated that science books for grades covered the principles of constructivism with a total percentage of (99.6%), At the grade level. Results showed that the content of textbooks for the three grades to gather, principle" encourages learner on collective work came in the last rank with (1%, 0%,3%), For each of them in Succession, Also, content analysis of sixth grade science textbooks showed that the principle of "emphasizes evaluation tools based on constructivisin was ranch first with (20%), Meanwhile, content analysis of seventh grade science textbook showed that the principle highlights interrelationships between ideas in the textbook and learner real life" came in the first order with (20%), while the principle "Considers the treatment of Miscue options acquired, from public life, by learners, with a (21%) and in the first rank, in the eighth grade text book, in the eighth grade text book Based on the results, the researcher presented a set of recommendations and proposals to include the principles of constructivism theory that did not obtain sufficient proportions for students of the studied classes and the general stages of education.
Comparative Analysis of STS contents on the Next Generation Science Textbook and High School Science Textbooks Focused on the Earth Science
