sangaroon, Chanpen. 2021. “A LEARNING DESIGN TO DEVELOP 21st CENTURY LEARNING SKILLS FOR STUDENTS OF NAKHON RATCHASIMA RAJABHAT UNIVERSITY”. Research Community and Social Development Journal 15 (3). Nakhon Ratchasima, Thailand:80-90. https://doi.org/10.14456/nrru-rdi.2021.47.