Apple says you can buy an iPad 2, donate your old iPad at an Apple Retail Store, and Teach For America (http://www.teachforamerica.org/) will give it to a teacher in a low-income community.
Teach for America is a non-profit organization dedicated to “eliminating educational inequity by enlisting our nation’s most promising future leaders in the effort.” Members commit to teach for two years in low-income communities, then go on as alumni to lead efforts to change the face of public education.