This past December, Teacher Evaluation Specialist K.C. MacQueen presented at the annual Learning Forward conference. MacQueen presented alongside Fort Wayne Community Schools’ (FWCS) Todd Cummings and Laura Cain, and Learning Forward’s Kay Psencik. The presentation titled, “Implementing Inter-Rater Reliability in a Learning System,” highlighted how FWCS has used Calibration & Certification Engine (CCE), School Improvement Network’s branded version of Observation Engine™, to ensure equitable evaluation of teacher effectiveness. FWCS detailed the process they used to engage instructional leaders in developing a common rubric vocabulary around their existing teacher observation rubric. While an uncommon step and one that definitely added to the implementation timeline, FWCS prioritized this collaboration and found that it increased both inter-rater reliability and buy-in to the process with the ultimate goal of assisting teachers in improving classroom instruction to result in greater student growth.