There are several ways to enhance your skills.
The Michgian Referee Committe provides instruction at certification and re-certification classes. USSF also offers videos, position papers, interpretations, and an ask-the-ref section. Go to www.ussoccer.com, and go to the "referee" link on the left. Additionally, the Grand Valley Soccer Officals Association (GVSOA) will offer a pre-season "tune-up" or class. The goal is to review and reinforce knowledge and skills prior to the season, and to update the referees on any changes/modifications by USSF during the off-season.
The GVSOA has many different levels of resources to assist referees in developing their game and management skills with the ultimate goal of assisting them move to higher referee grades.
ENDURANCE AGE REFEREE STATE REFEREE
12 minute* run under 38 2200 meters 2400 meters
38-45 2000 meters 2200 meters
over 45 1800 meters 2000 meters
50 meter dash all ages 9.0 seconds 9.0 seconds
200 meter dash all ages 40.0 seconds 40.0 seconds
* The referee must run for 12 minutes even if the minimum distance is covered
in less than 12 minutes. The purpose of the test is to determine the distance
the referee can cover in 12 minutes.