When later historians of education write about the transformation of American education from 20th century "industrial production" models to 21st century "learner-centered information age" models, the work of Wendy Kopp and Teach for America are likely to be at the forefront of those narratives. The very bright people who have developed a love for teaching through this program since its inception in 1990 have now started changing the entire educational system in the United States (setting up KIPP, carrying out major experiments in New Orleans and D.C., and starting dozens of charter schools). Here's a review of a major new book on TFA and some of its related efforts.
http://www.weeklystandard.com/Content/Public/Articles/000/000/015/309marzm.asp