This research brief examines Springfield Public Schools’ Effective Educator Coach (EEC) program. The EEC program is a comprehensive mentoring program in which experienced teachers support new or struggling teachers. The EEC program was studied as part of a larger evaluation of a Massachusetts’ Teacher Incentive Fund (TIF) grant implemented in the Springfield Public Schools (SPS); SRI International and Abt Associates conducted the study on behalf of the Massachusetts Department of Elementary and Secondary Education.