Adjustment of Mathematics Materials Based on STEM Approach to Improve Problem-Solving Skills. Lembaran Ilmu Kependidikan, [S. l.], v. 55, n. 1, p. 43–52, 2026. DOI: 10.15294/lik.v55i1.39942. Disponível em: https://journal.unnes.ac.id/journals/LIK/article/view/39942. Acesso em: 18 oct. 2026.