Links:
[1] http://www.edutopia.org/sara-ring
[2] http://www.edutopia.org/sleep-perchance
[3] http://www.bsu.edu/news/article/0,1370,7273-850-59668,00.html
[4] http://www.sleepfoundation.org/site/apps/nlnet/content2.aspx?c=huIXKjM0IxF&b=4009115&ct=5946403
[5] http://harvardmagazine.com/2005/07/deep-into-sleep.html
[6] http://www.teachermagazine.org/tm/articles/2008/09/23/tm_sleep.h20.html?utm_source=fb&utm_medium=rss&utm_campaign=mrss