Thima, L. Development of SEARCH-D Model learning management Model based on Constructivist theory with Activity sets to enhance Scientific process skills and Analytical thinking skills for Prathomsuksa 4 students: Development of SEARCH-D Model learning management Model based on Constructivist theory with Activity sets to enhance Scientific process skills and Analytical thinking skills for Prathomsuksa 4 students. rtnb 2025, 7, 311-323.