Some thoughts from the class:
Pick a student demonstrator. There are always rowdy kids and asking them to be quiet doesn’t usually work. Picking one of them and assigning them to be at the front of the room as a “demonstrator” can be a good strategy.
… but don’t play favorites. Make sure to ask each student’s name and give each person equal attention.
Make it challenging. Teenagers get bored easily and challenge keeps them interested. Play with handstands, jumpbacks, and backbends (they come naturally to many of them). When they groan and complain gently remind them it’s good practice for everything else that we struggling with in our lives.
… but don’t make it too challenging. Making it too hard will be discouraging. Pick appropriate poses that are challenging but also fun and realistic.
Be serious. Try not to let people watch from the side of the room (it’s distracting), don’t play music (also distracting), don’t allow chit-chatting. I was too lenient at first and had to learn my lesson.
… but don’t be too serious. Joke around, laugh, have fun. This should be something they want to come back and to do again!