Pitiporntapin, S. .; Butkatanyoo, O. .; Piyapimonsit, C. .; Thanarachataphoom, T. .; Chotitham, S. .; Lalitpasan, U. . The development of a professional development model focusing on outdoor learning resources to enhance in-service teachers’ STEM literacy. kasetsart J. Soc. Sci. 2023, 44, 489–496.