Thanks. I do take issue with the Heilig study. A third of its findings do not isolate TFA CMs and instead lump them in with "other noncertified teachers." (It uses language like, "Certified teachers outperformed uncertified teachers, including TFA teachers...") $70,000 is a very misleading figure for districts; CMs are paid the normal salary for all new teachers on provisional license and $5,000 or so "fee" that covers a small portion of TFA central office staff/ops and CM professional development costs within the region. The remainder of the costs (training, professional development) is covered privately, through AmeriCorps, and by TFA National. The reading studies he cites, however, are compelling to me. I was a below-average reading teacher during my first year in the classroom. I believe literacy teachers need a more comprehensive, experience-based training to be effective during their first year. It will be interesting to see if TFA's new senior year training model makes a difference in this area.
Also, as noted, attrition depends on the district and the question asked. Do TFA teachers leave high-needs classrooms at a much higher rate within four or five years? Absolutely--TFA's mission is to achieve educational equity by cultivating advocates for kids within and outside of education systems. It's mission is not to steward tens of thousands of career teachers. However, to say that a disproportionate number of teachers leave during the school year or after their first year of teaching is unsubstantiated at best.