First and formost!!!!!
Deb;
First and formost you need to explain to your class the importance of tree stand safety, with the use of safety belts, and or harnesses. Explain the difference that a harness is safer than a belt. Where a belt can and will probably hold you upside down if you do fall out of your tree stand.
You'll also need to explain to your class your state laws that require the use of screw in foot pegs. A lot of states restrick these on state lands, where the trees are sold for lumber.
Safety will always be the most important part of any safety class. Next will come your state rules and regulations.
Then you have to preach the importance of practicing with the bow they're going to use, and the equipement on the bow.
You need to explain how to shoot a bow with sights, or shooting a bow instintively. Tell them the correct shooting proceedures. Like the proper stance, dropping their bow arm, peeking at the arrow. The correct anchor spot, and to anchor in the same place all the time. Also the correct way to shoot with a tab or fingers, and about plucking the bow string. The correct way to use a release. And different equipment that can go on a bow. Examples are stablizers, arrow rests, peep sights, silencers, ect. Also the importance of correct arrow weight for the poundage they're shooting.
Then your going to have to teach arrow placement. Tell them exactly where to shoot a deer, turkey, bear ect. Explain the importance in waiting a half an hour to an hour after you shoot an animal. Teach them correct tracking proceedures when they're tracking their game.
But all in all stress the importance of PRACTICE, PRACITCE, PRACTICE with their bow. Too many hunters don't realize this. They need to practice year around. Get them to join an archery league, go to 3D target ranges. Even bowfishing in the spring. BUT PRACTICE!!!
Hope this give you some insight that will help you out.
Coyote Caller