http://people.ehe.ohiostate.edu/ahoy/files/2009/02/permission
http://nces.ed.gov/pubs2002/2002013.pdf
http://www.galluppoll.com/content/?ci=14410&pg=2
http://nces.ed.gov/pubs2009/2009324.pdf
http://www2.ed.gov/policy/gen/guid/religionandschools/index.html
http://www.des.emory.edu/mfp/eff.html
http://religions.pewforum.org/pdf/comparisons-all_beliefs.pdf
http://www.nsba.org/MainMenu/SchoolLaw/Issues/Religion/RecentCases/BordenvEast