Mongkholsiriwattana, Chinapat, and Monamorn Precharattana. “STEM-Based Gear Activities for Enhancing Understanding and Satisfaction in a Thai Multi-Grade Engineering Class”. AsTEN Journal of Teacher Education (November 26, 2025). Accessed October 23, 2026. https://po.pnuresearchportal.org/ejournal/index.php/asten/article/view/3352.