Kopalang, J., Prapasanobol, V. and Yuenyong, Y. (2025) “The Development of Scientific Problem Solving Ability and Teamwork Skills by using Problem Based Learning and Group Investigation Technique for Grade 3 Students”, Education journal Faculty of Education, Nakhon Sawan Rajabhat University . Nakhon Sawan,Thailand, 8(4), pp. 208–220. doi: 10.2774.EDU2025.4.282899.