8Penn GSE study shows MOOCs have relatively few active users,withonly a few persisting to course end[ EB/OL]. [2015 - 02 - 15 ].http://www. gse. upenn. edu/pressroom/press - releases/2013/12/penn - gse - study - shows - mooes - have - relatively - few -active - users - only - few - persisti.
9Allen I E,Seaman J. Changing course : Ten years of tracking onlineeducation in the United States f EB/OL ]. [2015 -08 -02 ]. ht-tp ://www. onlineleamingsurvey. com/reports/changingcourse. pdf.