level of inclusion of basic scientific process skills in science text books for the basic stage in the Republic of Yemen. Humanities and Educational Sciences Journal, [S. l.], v. 6, n. 14, p. 526–554, 2021. DOI: 10.55074/hesj.v6i14.219. Disponível em: https://hesj.org/ojs/index.php/hesj/article/view/219. Acesso em: 25 jun. 2026.