HAMID, S. A. Identifying the Effect of the Van Hill Model on the Development of Reasoning Thinking Skills among Fifth Graders in Biology. Journal of Tikrit University for Humanities, [S. l.], v. 27, n. 2, p. 367–392, 2020. DOI: 10.25130/jtuh.27.2.2020.17. Disponível em: https://jtuh.org/index.php/jtuh/article/view/1181. Acesso em: 15 jul. 2026.