Excellent resource covering Wallwisher, Socrative, and Todays Meet with step-by-step guides for setting up and using in the classroom. Downloadable as well in PDF.
I agree with some of these reasons - there are two mains issues - 1) lack of good quality e-books (in other words 'e-books' that are really PDF format with limited hyperlinking, interaction and social media 2) a lack of vision amongst teachers to encourage students to write their OWN text books.