VALIDITY AND TEACHERS’ RESPONSES TO THE IN ACTION LEARNING DESIGN GUIDEBOOK. Mathematics Education and Application Journal (META), [S. l.], v. 7, n. 2, p. 93–106, 2025. DOI: 10.35334/x8v7vv10. Disponível em: https://jurnal.ubt.ac.id/index.php/jurnalmeta/article/view/364. Acesso em: 20 sep. 2026.