11/13/2016 A recent report by the Mathematica’s Policy Research center found no difference in effectiveness of teachers in low and high poverty schools. https://www.mathematica-mpr.com/our-publications-and-findings/projects/access-to-effective-teaching-for-disadvantaged-students  Eric Isenberg, the principal investigator on the project stated, “Contrary to conventional wisdom, we found only small differences in the effectiveness of teachers of high- and low-income students in our study districts, This suggests that the achievement gap arises from factors other than students’ access to effect teachers,”