Studying English online is a very good way of learning (cheaper, more flexible etc) comparing with traditional way of studying in school using study's books. But if online language school uses study's book in the class and gives to students this material before and after class it has much more benefits.
It refers to the online English school englishdom.com . The class on the 10 February 2016 was designed in that style. The teacher Cari gave material from the student's book before class and we had an excellent discussion about production during the class.
As I mentioned it before, it is unusual practice for online schools and It has lot of benefits (better structured class material, prepared subject for discussion it the class and other advantages of the systematic studying).