TY - JOUR AU - Jackson,C. Kirabo AU - Bruegmann,Elias TI - Teaching Students and Teaching Each Other: The Importance of Peer Learning for Teachers JF - National Bureau of Economic Research Working Paper Series VL - No. 15202 PY - 2009 Y2 - August 2009 UR - http://www.nber.org/papers/w15202 L1 - http://www.nber.org/papers/w15202.pdf N1 - Author contact info: C. Kirabo Jackson Northwestern University School of Education and Social Policy 2040 Sheridan Road Evanston, IL 60208 Tel: 847/467-1803 E-Mail: kirabo-jackson@northwestern.edu Elias Bruegmann Cornerstone Research E-Mail: no email available AB - Using longitudinal elementary school teacher and student data, we document that students have larger test score gains when their teachers experience improvements in the observable characteristics of their colleagues. Using within-school and within-teacher variation, we further show that a teacher’s students have larger achievement gains in math and reading when she has more effective colleagues (based on estimated value-added from an out-of-sample pre-period). Spillovers are strongest for less-experienced teachers and persist over time, and historical peer quality explains away about twenty percent of the own-teacher effect, results that suggest peer learning. ER -