“…However, “pre-k” does not have a standardized meaning with respect to children’s’ ECE experience because each state creates their pre-k programs independently, and, thus, the characteristics of these program vary widely across states (Gilliam & Ripple, 2004; Jenkins, 2014; Lombardi, 2003; Pianta & Howes, 2009). Some pre-k programs—such as Oklahoma’s—are recognized as very high quality and offer features such as frequent instructional interactions in subject-matter learning, teachers who are emotionally supportive of children and who are credentialed, and classroom environments that are well-organized, efficient with time management, and include developmentally appropriate learning materials (Burchinal, 1999; Mashburn et al, 2008; Phillips, Gormley, & Lowenstein, 2009; Pianta et al, 2005; Wong, Cook, Barnett, & Jung, 2008). For these reasons, the effects of any particular pre-k program cannot be generalized to state pre-k programs nationwide.…”