http://www.npr.org/2013/12/29/257922222/closing-the-word-gap-between-rich-and-poor

What conclusions do you draw from this?
Read.
Read challenging books.
Read newspapers, magazines, different genres, opposing opinions.
Read print and spare the backlight.
Read.

http://parenting.blogs.nytimes.com/2014/04/10/students-reading-e-books-are-losing-out-study-suggests/
If there are interactive features in the ebook, the distraction appears to affect comprehension and recall.