defined: 

http://heartsandminds.org/articles/childpov.htm

http://www.ioe.ac.uk/media/r000320.htm

http://education.umn.edu/research/ResearchWorks/Parent-Child.htm

http://www.cfah.org/hbns.newsrelease/depression11-19-01.cfm

http://www.teach-nology.com/tutorials/teaching/poverty/7/
http://ruraledu.org/docs/sapss/georgia_press.html

http://weac.org/News/2001-02/dec01/wiskids.htm

http://www.futureofchildren.org/informatino2827/
informaion_show.htm?doc_ed=72168