This document provides information about concussions for coaches, parents, school nurses, and volunteers. It defines a concussion as a traumatic brain injury caused by a blow to the head that disrupts normal brain function. It lists common signs and symptoms of a concussion affecting thinking, physical abilities, emotions, and sleep. It instructs that any athlete showing concussion signs should be removed from play and referred to medical personnel. It warns of more serious head injuries and potential long-term issues from concussions like depression or memory problems. It also states that written medical clearance is required before returning an athlete to play following a concussion.