The Centers for Disease Control has partnered with several youth sports groups to roll out the Heads Up: Concussion in Youth Sports program. This is a program designed to help protect and educate athletes, parents and coaches.
They have a lot of resources on the site. They have fact sheets, quizzes, posters, etc. that everyone can use.
For example, True or False: A repeat concussion that occurs before the brain recovers from the first can slow recovery or increase the likelihood of having long-term problems. TRUE.