A great quote from Curmudgucation:
… TFA bodies are eligible to be foot soldiers in this battle to put effective teachers into the classroom. Now, despite their glowing PR, there’s no reason to believe that TFA bodies can magically erase the effects of poverty, but by the time test data has been gathered up to indicate their ineffectiveness, they will have moved on anyway. An endless revolving door churn through a black hole of teacher ineffectiveness perfectly suits the TFA model.
You might imagine that two years as an “ineffective” teacher might be a black mark on the record of a blossoming young Master of the Universe, but take heart– Michelle Rhee was ineffective as a classroom teacher and disastrous as a school leader, but that has not slowed her rise to lucrative fame as an education thought leader and celebrity spokesmodel one bit. You only have to be able to say you were in a classroom; it doesn’t matter to your career if you were great or terrible.