4Krashen S. The Input Hypothesis: Issues and Implications [M]. London: Longman, 1985.
5Larsen-Freeman D. Teaching Language : From Grammar to Grammaring [ M ]. Beijing: Foreign Language Teaching and Research Press, 2005.
6Long M. Native speaker/non-native speaker conversation and the negotiation of comprehensible input [ J] plied Linguistics, 1983, (2): 126-141.
7Swain M. Communicative competence: Some roles of comprehensible input and comprehensible output in its development [ A ]. In Gass S & Madden C ( eds. ). Input in Second Language Acquisition [ C ]. Rowley, MA : Newbury House, 1985. 235-253.
8Tyler R W. Basic Principles of Curriculum and Instruction [ M ]. Chicago : The University of Chicago Press, 1949.
10Baker, J. W. The "classroom flip": Using web course management tools to become the guide on the side [A]. In Chambers, J. A.(ed). Selected Papers from the 11th International Conference on College Teaching and Learning [C]. Jacksonville, FL: Florida Community College at Jacksonville, 2000: 9-17.
