emphasizes drills and practice with immediate feedback; lessons precisely sequenced; fast paced; and well-rehearsed by the teacher. This is facilitated by Task Analysis, which deconstructs a learning task into its components. DI implies frequent assessments and is based on the theory of mastery learning where students do not move on until they master each concept. DI programs received the “highest” ranking for instructional effectiveness (Ellis, A. “Research on educational innovations,” Eye on Education, 2001).