- http://www.fns.usda.gov/cnd/lunch/
- http://nces.ed.gov/programs/coe/indicator_clp.asp
- http://homeless.samhsa.gov/Resource/How-Poverty-Affects-Children-Lesson-Plans-for-Highschool-Students-46990.aspx
- http://www.education.com/reference/article/socioeconomic-status/#A