3Leontyev A,Baranov D.Massive Open Online Courses in Chemistry:A Comparative Overview of Platforms and Features[J].Journal of Chemical Education,2013,90(11):1533-1539.
4Arnaud C H.Flipping Chemistry Classrooms[J].Chemical & Engineering News,2013,91(12):41-43.
5Cross,A., Bayyapunedi,M. & Cutrell,E. et a1.(2013). Ty- peRighting: Combining the Benefits of Handwriting and Type- face in Online Educational Videos[A]. Proceedings of the SIG- CHI Conference on Human Factors in Computing Systems[C]. Paris, France.
6Duhring,J.(2013). MOOC Production Values: Costs, Ap- proaches and Examples[-EB/OL].[2013-07-08].http://moocnewsan- dreviews.com/mooc-production-values-costs-approaches-and- examples/.
7Guo,P.J., Kim,J. & Rubin,R.(2014). How Video Produc- tion Affects Student Engagement:An Empirical Study of MOOCs Videos[A]. Proceedings of ACM Conference on Learning at Scale [C]. Atlanta, Georgia, USA.
8Ho,A.D., Reich,J. & Nesterko,S. et a1.(2014). HarvardX and MITx: The First Year of Online Courses (HarvardX and MITx Working Paper #1)[EB/OL].[2014-01-21]. http://dx.doi. org/10.2139/ssrn.2381263.
9Kizilcec,R.F., Papadopoulos,K. & Sritanyaratana,L. (2014). Showing Face in Video Instruction: Effects on Informa- tion Retention, Visual Attention, and Affect[A]. Proceedings ofthe SIGCHI Conference on Human Factors in Computing Sys- tems[C]. Toronto, Ontario, Canada.
10Lorang,T.(2013). 7 Reasons Why Students Turn off Your MOOC Video[EB/OL].[2013-07-03].http://www.imagemediapartners. com/video-blog/bid/99678/7-Reasons-Why-Students-Turn-off- your-MOOC-Video.