This document summarizes a lesson on concussions and public policy. It discusses concussions as a major public health issue and outlines current concussion policies in Ontario, including Rowan's Law and PPM 158. It reviews research on the impact of these policies, specifically increased concussion reporting and identification in schools. However, it notes disconnects between research and policy implementation. It concludes by recommending continued concussion research, improved education, common data collection, and evaluation of policy impact to advance concussion prevention and management.