“…Leithwood and Jantzi (2009) summarize that studies using U.S. nationally representative longitudinal samples as well as many using statewide public school data report advantages for moderate‐size (e.g., 600–1,000) schools include learning (Howley & Bickel, 1999; Lee & Smith, 1997), achievement equity (Bickel, Howley, Williams, & Glascock, 2001; Lee & Smith, 1997), student engagement (Weiss, Carolan, & Baker‐Smith, 2010), and student retention (Gardner, Ritblatt, & Beatty, 1999). However, a raft of other studies examining math achievement or gains show very small to no direct school size effects (Weiss et al, 2010; Wyse, Keesler, & Schneider, 2008), curvilinear effects favoring smaller and larger schools (Werblow & Duesbery, 2009), or effects for large schools (Lindahl & Cain Sr, 2012; Schreiber, 2002), including for Black students (Greeney & Slate, 2013).…”