Read this artircle posted on Skydmagazine: GYM CLASS ULTIMATE
Ultimate frisbee in 5 Lessons
Three concepts to play a fair and fun game:
1) Don't run with the disc; 2) Scoring a point and 3) No contact.
"The integrity of Ultimate depends on each player's responsibility to uphold the Spirit of the Game, and this responsibility should remain paramount."
Allow players to begin self-officiating as soon as they seem to understand the rule concepts.