To help with reading see the Literacy page.
The power of reading:
Teens who read for pleasure-rather than just for school work-are more likely to have professional careers as adults than those who don't crack open books for leisure, says a study conducted by the University of Oxford in the United Kingdom.

http://www.slj.com/slj/articlereview/890530-451/teens_who_read_for_pleasure.html.csp

A collection of websites for helping children of all ages master subject based skills can be found at this website:
http://www.mentormob.com/categories/browsePlaylists/academic