REMZI Y. KINCAL; AKAN DENIZ YAZGAN. Investigating the Formal Operational Thinking Skills of 7th and 8 th Grade Primary School Students According to Some Variables. Elementary Education Online, [S. l.], v. 9, n. 2, p. 723–733, 2023. Disponível em: https://ilkogretim-online.org./index.php/pub/article/view/718. Acesso em: 1 jul. 2024.