“…In fact, surveys of reported large-scale studies examining the efficacy and effectiveness of K-12 curriculum interventions rarely report FOI, and even more rarely report how FOI enhances or limits the effects of the intervention on outcomes, thus limiting confidence that external and internal validity have been established (Mowbray, Holter, Teague, & Bybee, 2003). In light of these findings, educators, researchers, and policy makers increasingly expect educational researchers to measure and report FOI to K-12 curriculum intervention efficacy or effectiveness studies in the development and adoption of evidence-based practices (Cook & Cook, 2011;Jolly & Kettler, 2008;Slavin, 2002;Walsh, Kemp, Hodge, & Bowes, 2012). For example, the Institute of Education Sciences (IES) at the U.S. Department of Education requires researchers to evaluate and report FOI, at least to a basic extent, in funded curriculum intervention efficacy research to demonstrate that a practice is evidence based (U.S. Department of Education, 2003a).…”