All SYFA coaches, head and assistant, are REQUIRED by Minnesota law to take head injury training every three years. The CDC has provided a free online course that we encourage all coaches to take:
http://www.cdc.gov/concussion/HeadsUp/online_training.html
In addition to this training, the CDC has an extensive website set up to inform coaches, parents, and athletes about concussions and head injuries:
http://www.cdc.gov/concussion/HeadsUp/youth.html
We've included some of the documents on their website here for your convenience.