Does Flipped Classroom Improve Student Cognitive and Behavioral Outcomes in STEM Subjects? Evidence from a Second-Order Meta-Analysis and Validation Study. - Khe Foon Hew; Shurui Bai; Weijiao Huang; Jiahui Du; Guoyuhui Huang; Chengyuan Jia; Thankrit Khongjan (ICBL, 2020)