Aspects of learning, including attention, memory and decision making, are inextricably integrated with emotion networks. Emotion is central to cognition. In addition, there is variability in engagement; what motivates and encourages one student to persist through challenges will differ from that of another student, and will even differ within the same individual at different times. Knowing how essential emotion is for learning, how can educators use the UDL framework to design lessons that support variability in engagement? How can they measure engagement to reflect on progress towards the deeper learning goals that are desired at a classroom, school, and district level? This resource presents initial reflections from a Massachusetts school district implementing the UDL framework in order to achieve improvement in student engagement.