Here some resources for coaches:

Heads Up Concussion Training Course

Center for Disease Control – Injury Prevention and Control – Traumatic Brain Injury

Center for Disease Control – A Coaches Guide to Concussion

Center for Disease Control – Concussion Policy

Sports Related Concussions – Boston Childrens Hospital – Download

Sport-Related Concussion in Children and Adolescents – American Association of Pediatrics – Download

Concussion Overview – Web MD Article

Concussions – Mayo Clinic Article