“…Among studies using output-oriented approaches, evidence is mixed. Some have found meaningful differences between programs, suggesting that preparation can have significant effects on teachers' later performance (Henry, Purtell, et al, 2014;Boyd, Grossman, Lankford, Loeb, & Wyckoff, 2009;Gansle, Noell, & Burns, 2012). Using a school fixed effects (SFE) approach to examine all elementary programs that supply teachers to New York City schools, Boyd et al (2009) found differences between the average and the most effective programs to be 0.07 standard deviations in both math and English language arts (ELA).…”