“…Each of these explanations fall short of giving combination class teachers credit for handling, by all accounts, a highly complex and demanding learning environment that involves a wide range of students, two curriculums, two instructional presentations, two evaluation systems, and numerous scheduling and classroom management problems. Finally, we wonder just how much training combination teachers would need to improve their student achievement, given that an apparently well-developed training program used by Veenman and his colleagues (Roelofs, 1993;Roelofs, Raemaekers, & Veenman, 1991;Roelofs, Veenman, & Raemaekers, 1994;Veenman & Raemaekers, 1995) did not raise achievement above that of single-grade classes with untrained teachers.…”