The impact of teaching geography according to the Merrill model on the acquisition and retention of concepts among students. Intermediate first grade students. Journal of the College of Basic Education, [S. l.], n. 51, p. 221–258, 2023. DOI: 10.35950/cbej.vi51.9572. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9572.. Acesso em: 18 jul. 2024.