The key purpose of playground supervision is to ensure safety. Nearly 200,000 playground injuries occur in the US each year requiring emergency room visits, and 40% of these are related to inadequate supervision. Quality supervision can significantly reduce injuries by preventing interactions that may lead to harm. Playground supervisors must understand their responsibilities to provide a safe environment for children through careful supervision of designated zones, monitoring for hazards, enforcing rules and intervening when needed to stop inappropriate behaviors. Over 40% of injuries can be attributed to issues of supervision, so supervisors must be vigilant and not engage in other activities when on duty.