I said TFA because I want to be a teacher anyway, and I figured it'd help the world more if I could start right away in stead of waiting through a few more years of grad school. TFA's the biggest organization doing this kind of work, so it stands to reason that they're doing something right. Education inequality is probably the most important issue faced by my generation, other than maybe global warming and water scarcity, so it's incumbent upon the people capable of teaching to do so.