8Bahhouth J. Bahhouth V, Maysami R C. Significance of E- Learning In Traditional Classes [J]. International Journal of Education Research, 2011,6(2) : 1-9.
9Katie Ash. Educators evaluate flipped Classrooms^Benefits andDrawbacks Seen in Replacing Lectures with on-Demand Video[J]. Education Week, 2012(10 ) :6-8.