Every great performance has a solid opening and a great conclusion. In instructor classes, I like to have the candidates demonstrate their 30-second elevator pitch - why should I take a class from you? Start by getting to know your students and what they wish to achieve out of this course. Follow-up by introducing your assistants and then give a short synopsis' on your background.
After introductions, it is time to set the ground rules. This is a great time to talk about challenge by choice, facilities, and any ground rules you may have. If you haven't done so, make certain you collect all of the necessary paperwork. Now is a good time to discuss medical disclosure forms if you have them. Always review the liability waivers as they are a crucial part of risk management.