Mansup, M. .; Meesup, P. .; Rimcholakarn, Y. . A Study of the Needs Conditions for Development of a Combined Model of Active Proactive Learning With KWDL Techniques to Enhance Mathematical Problem Solving Skills for Junior High School Students. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University 2021, 15, 468-482.