EGA GRADINI. TEACHING MATHEMATICS WITH PIAGET’S THEORY. Visipena, [S. l.], v. 4, n. 1, p. 1–7, 2013. DOI: 10.46244/visipena.v4i1.98. Disponível em: https://ejournal.bbg.ac.id/index.php/visipena/article/view/98. Acesso em: 3 aug. 2026.