Melati, M., & Hadinugrahaningsih, T. . (2024). The Effect of Numbered Head Together (NHT) in a Flipped Classroom Environment on Students’ Self-Efficacy and Achievement on Colloid Topics. Journal of Research in Education and Pedagogy, 1(1), 24-29. https://spm-online.com/jrep/index.php/journal/article/view/3