Research suggests that PD is ineffective without sustained and significant support and follow-up (Fixsen, Naoom, Blase, Friedman, & Wallace, 2005), defined as 30 or more direct contact hours with each teacher (Yoon et al., 2007). A number of successful classroom and behavior management PD programs that include approximately 30 or more hours of direct contact have been developed and evaluated, demonstrating successful adult behavior change. For example, Hemmeter, Snyder, Fox, and Algina (2016) evaluated the implementation of the Pyramid Model for Promoting Young Children's Social-Emotional Competence, a behavior management program for young children. Teachers received almost 20 hr of workshops and an average of 13 practicebased coaching sessions, each including almost 2 hr of observation and 45 min of debriefing. Teachers who received 693568P BIXXX10.