A concussion is a type of mild traumatic brain injury (mTBI) that can result in a constellation of problematic symptoms. These include cognitive, physical, emotional, social, and behavioral symptoms, all of which can affect students’ well-being and performance in school. However, because concussions are largely a neurometabolic injury, they are not likely to show up on an x-ray, computed tomography (CT) scan, or magnetic resonance imaging (MRI). Similarly, students with a history of learning disabilities, attention deficit hyperactivity disorder (ADHD), or other developmental disorders may also be at higher risk, as are those with sleep disorders or previous mental health problems, including anxiety, depression, and other psychiatric disorders. Much of the emerging research on postmortem brains of athletes who developed chronic traumatic encephalopathy (CTE), a chronic degenerative brain disorder, indicates that both concussions and subconcussive blows can be risk factors.