Links:
[1] http://www.edutopia.org/sara-ring
[2] http://www.nber.org/papers/w14021.pdf?new_window=1
[3] http://ierc.siue.edu/documents/IERC2008-1.pdf
[4] http://www.villagevoice.com/2007-07-24/art/your-own-personal-blackboard-jungle/
[5] http://www.edweek.org/ew/articles/2008/07/16/43teachgap.h27.html?tmp=1803461724
[6] http://www.nea.org/lac/highered/adjoppose.html
[7] http://www.edutopia.org/building-a-better-teacher
[8] http://www.teachermagazine.org/tm/articles/2008/10/06/08nhshortage_ap.h19.html?levelId=1000