Joyhertati Saragih and Jamalum Purba 2025. The Effect of the Numbered Heads Together (NHT) Cooperative Learning Model and Puzzle Maker-Based TTS Media on Junior High School Students’ Science Learning Outcomes. Journal of Teacher Training and Education. 12, 1 (Oct. 2025). DOI:https://doi.org/10.36588/tv6ea065.