Remove the athlete from play – if any of the signs and symptoms are observed, remove the athlete from play. When in doubt, sit them out! Make sure the athlete is evaluated by an MD or DO who is experienced in evaluating concussions. Let the professionals judge the severity. Inform the athlete’s parents / guardians and provide them with the CDC fact sheet on “Concussions for parents” to help them monitor the athlete for signs and symptoms: http://www.cdc.gov/headsup/pdfs/custom/headsupconcussion_fact_sheet_for_parents.pdf Keep the athlete out of play the day of the injury AND until an MD or DO experienced in evaluating concussion says it’s OK for the athlete to return.  The MD or DO must provide written medical clearance and the athlete should be asymtematic at rest and with exertion.  The MD or DO should require the athlete to follow a progressive return to play protocol.  Here is a link to the CDC’s progressive return to play protocol: https://www.cdc.gov/headsup/basics/return_to_sports.html