Poonyawatpornkul, J., Pitsamai, S., Methakesorn, O., & Mangmee, K. (2025). Effectiveness of Online Experiments for Conceptual Understanding of Simple Pendulum by Physics Student-Teachers. Journal of Learning for Development, 12(1), 205–219. https://doi.org/10.56059/jl4d.v12i1.1142