Need for better teachers
I was speaking with a former TFA corps member and we got to talking about the greatest barrier to improving our schools, especially those in inner cities (where he worked): the lack of great teachers. What he said underscores how bad the problem is in inner-city schools:
97% of the teachers at schools like the one I was in need to be replaced. Seriously. Of the 100+ teachers at my school, excluding the TFA teachers, there were no more than three where you or I would tolerate having one of our own children in their classroom.