ACAR, Ömer. An investigation of grade level and gender-based science achievement gaps in schools with different science achievement levels. Pegem Journal of Education and Instruction, [S. l.], v. 10, n. 1, p. 01–16, 2019. DOI: 10.14527/pegegog.2020.001. Disponível em: https://www.pegegog.net/index.php/pegegog/article/view/pegegog.2020.001. Acesso em: 28 jul. 2026.