ARMAN RAMADAN; MUHAMMAD AMMAR NAUFAL; NUR WAHIDIN ASHARI; MUHAMMAD NASIRU HASSAN. Improving Students’ Geometric Thinking Levels through a Van Hiele Learning Module Integrated with Ethnomathematics. Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences, [S. l.], v. 5, n. 5, p. 1052–1061, 2026. DOI: 10.53696/venn.v5i5.607. Disponível em: https://journal.web.id/journals/venn/article/view/607. Acesso em: 1 nov. 2026.