“…A range of studies has supported the efficacy of embedding instruction into ongoing activities to target important skills such as communication (e.g., Kaiser, Yoder, & Keetz, 1992;Schwartz, Anderson, & Halle, 1989;Warren, 1992; Warren & Gazdag, 1990), play and academic engagement (e.g., Fox & Hanline, 1993; Malmskog & McDonnell, 1999), peer imitation (e.g., Garfinkle & Schwartz, 2002;Venn et al, 1993), social interaction (e.g., Filla, Wolery, & Anthony, 1999), and self-help skills (e.g., Sewell, Collins, Hem-meter, & Schuster, 1998). Little is known, however, about what ecological, staff, and classroom variables must be in place for teachers to use naturalistic strategies with strong procedural fidelity (Lieber, Schwartz, Sandall, Horn, & Wolery, 1999;Pretti-Fronczak & Bricker, 2001 ).…”