Payakkhin, A., Klomsakul, P., Nilsuwan, A. and Vachiraporn Funan, V. 2025. DEVELOPING THE ABILITY TO DESIGN ASTRONOMY TEACHING ACTIVITIES USING STEM PLUS ASTRO ACTIVITIES FOR PRE-SERVICE TEACHERS. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences. 20, 2 (Dec. 2025), 209–219.