1Milman,Natalie B. The Flipped Classroom Strategy: What is it and How Can it Best be Used? [J].Distance Learning, 2012(9):85-87.
2GrahamlL. Commentary: The Khan academy and the day- night flipped classroom. Biochemistry and Molecular Biology Educa- tion,V01.40,1ssue 5,2012(90):337-338.