“…Notwithstanding the diversity in program delivery and various investigations’ analytic designs, there is now strong evidence from the developmental and educational sciences to suggest that children who attend pre-K, as compared with those without pre-K experience, are more ready for kindergarten in the areas of language, literacy, and math, particularly at the start of the year, when compared with children who do not have such experience (Barnett et al, 2018; Camilli, Vargas, Ryan, & Barnett, 2010; Duncan & Magnuson, 2013; Phillips et al, 2017; Yoshikawa et al, 2013). These results have been shown through evaluations of small-scale demonstration programs in the 1960s and 1970s (Campbell & Ramey, 1994; Schweinhart et al, 2005) and verified over the years with evaluations of a variety of scaled-up state and federal programs (Barnett et al, 2018; Gormley, Gayer, Phillips, & Dawson, 2005; Montrosse-Moorhead, Dougherty, Salle, Weiner, & Dostal, 2019; Puma et al, 2012; Weiland & Yoshikawa, 2013). And even though the magnitude of program impacts varies considerably and scaled-up evaluations see smaller end-of-treatment impacts than earlier small-scale demonstration programs, a meta-analysis by Li and colleagues (2020) of more than 65 programs reports that the cognitive impacts of program participation are approximately a quarter of a standard deviation upon program exit.…”