“…We assessed methodological quality to evaluate the validity of the conclusions of the included studies. We used indicators based on standards available from reviews of previous educational intervention studies (e.g., Engberg, 2004; Gersten et al, 2005; Hebert, Simpson, & Graham, 2013; O’Donnell, 2008; Pyle, Pyle, Lignugaris/Kraft, Duran, & Akers, 2017), as well as handbooks about research design (e.g., Shadish et al, 2002) and curriculum design (e.g., Van den Akker, Gravemeijer, McKenney, & Nieveen, 2006).…”