This four-page issue brief summarizes findings from Mathematica's evaluation of Teach For America. The researchers found that TFA teachers outperformed non-TFA teachers in the same schools in math and achieved the same results in reading. However, TFA teachers also reported greater challenges in managing their classrooms. TFA and non-TFA teachers had very different educational and teacher preparation backgrounds, with TFA teachers generally coming from more competitive undergraduate backgrounds but with less formal teacher training. However, non-TFA teachers came from a diversity of backgrounds and preparation, with many entering the profession without substantial teacher training. (Contains 2 figures.)