4C.M.REIGELUTH.Instructioanl design theories and models:anoverview of their current status[M].Hillsdale,New Jersey:Lawrence Erlbaum Associates,1983.
5ROBERT HEINICH,MICHAEL MOLENDA,JAMES D.RUS-SELL,et al.Instructional media and technologies for learning(Eighth Edition)[M].Beijing:Pearson Education North Asia Lim-ited and Higer Education Press,2006.