Suan Sunandha Rajabhat University Demonstration School would like to congratulate our outstanding Director,

Associate Professor Dr. Sumalee Thianthongdee,

Director of Suan Sunandha Rajabhat University Demonstration School,

on her research publication in the Journal of Education and Learning Vol. 20 No. 2 May, 2026.

The research article is titled:

"The impact of PBL STEAM model of light and optics on problem-solving skill of pre-service science teachers."

It is listed in the Scopus and SJR databases, quartile 3. Along with

her co-researcher, Asst. Prof. Dr. Pornthida Wisesilpanont, Mahidol University.