Munta S, Phoojomjit P. The Development Guidelines for Teacher in Learning Management for 21st Century for Schools Under The Maha Sarakham Primary Education Service Area Office 1: The Development Guidelines for Teacher in Learning Management for 21st Century for Schools Under The Maha Sarakham Primary Education Service Area Office 1. rtnb [internet]. 2023 Dec. 30 [cited 2025 May 31];5(3):194-209. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/3622