"Technology can be more than a tool for drilling students on skills; it can be a tool for acquiring the vocabulary and background knowledge essential to becoming a skilled reader (Biancarosa, Griffiths, 2012, p. 139 )."
Although there are many smaller research studies that have shown the effectiveness of E-Reader technology in the classroom there have not been a sufficient number of large scale research studies to validate it.
Biancarosa, G., & Griffiths, G. G. (2012). Technology Tools to Support Reading in the Digital Age. The Future of Children, 22(2), 139-160. doi:10.1353/foc.2012.0014