This session will describe the process Princess Margaret Secondary School undertook in order to collectively move toward grading practices that are fair, reasonable, and look to build student confidence. Specifically, this session will detail: (1) Three of the most ineffective grading practices that distract high school teachers and distort student grades, and why they should be stopped immediately, (2) The staff development model that Princess Margaret used in order to develop staff fluency with the new practices being implemented and capacity to ensure effective implementation, and 3) Some of the roadblocks & challenges school's might face (and overcome) when they undertake a similar process. In addition, participants will be introduced to the background research used to support the introduction of these more effective grading practices. School- and classroom-based examples will also be provided.