The Preliminary Studies of Critical Thinking Skills on Subject of Matter and Their Changes on Middle Schooles. Indonesian Journal of Education Research (IJoER), [S. l.], v. 5, n. 6, p. 260–269, 2024. DOI: 10.37251/ijoer.v5i6.1234. Disponível em: https://cahaya-ic.com/index.php/IJoER/article/view/1234. Acesso em: 25 may. 2026.