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3. Teaching for flexible learning;Caladine,1999
4. A comparative analysis of the effects of computer-assisted instruction on student achievement in differing science and demographical areas;Christmann;Journals of Computers in Mathematics and Science Teaching,1999
5. The effectiveness of computer-assisted instruction on the academic achievement of secondary students: A meta-analytic comparison between urban, suburban, and rural educational settings;Christmann;Computers in the Schools,1997