“…Many more groups need to be randomly assigned to treatment and control conditions to have adequate power, also known as cluster-randomization in the literature. There are many scholars spearheading this line of research, and guide practitioners to design rigorous clusterrandomized trials (e.g., Bloom, 1995Bloom, , 2006Bloom et al, 1999;Bulus & Dong, 2021;Bulus & Şahin, 2019;Cox & Kelcey, 2019a, 2019bDong, Kelcey, & Spybrook, 2017;Dong & Maynard, 2013;Dong, Kelcey, & Spybrook, 2017;Kelcey, Dong, Spybrook, & Cox, 2017;Kelcey, Dong, Spybrook, & Shen, 2017;Konstantopoulos, 2009Konstantopoulos, , 2011Konstantopoulos, , 2013Raudenbush, 1997;Raudenbush & Liu, 2000;and many others). There are publicly available software tools that implement results from these studies to assist with the design of cluster-randomized trials (e.g., PowerUp!, Dong & Maynard, 2013;PowerUpR, Bulus et al, 2019;OD+, Spybrook et al, 2011).…”