The Effect of the Flipped Learning Strategy on Achievement and Analytical Thinking Among Second-Grade Middle School Students in Mathematics. College of Basic Education Research Journal, [S. l.], v. 22, n. 2, p. 146–177, 2026. DOI: 10.33899/berj.2026.Vol22.Iss2.61833. Disponível em: https://berj.uomosul.edu.iq/index.php/berj/article/view/61833. Acesso em: 22 sep. 2026.