A crucial step in clarifying and consolidating the learning gained from simulations in healthcare is to debrief those simulation experiences-that is, to methodically review what happened and why. Leading a debriefing is a learned skill, and can be improved with practice and feedback. The Debriefing Assessment for Simulation in Healthcare (DASHTM) Handbook and Rating Forms are designed to assist in evaluating and developing debriefing skills. Additional information, rating forms, and contact information can be found at the DASH website: http://www.harvardmedsim.org/dash.html.