Enhancing Critical Thinking in Mathematics through Android-Based Multimedia and PjBL-STEM. Online Learning In Educational Research (OLER), [S. l.], v. 5, n. 1, p. 81–93, 2025. DOI: 10.58524/oler.v5i1.534. Disponível em: https://www.journal.foundae.com/index.php/oler/article/view/534. Acesso em: 17 jan. 2026.