Start off with a bit of amazing drone video, so they see what a drone sees when flown properly. Maybe something like some of the members on here have posted from Austria or Switzerland. Then maybe show something local to you or around Ohio. That gets them excited.
Then tell them this is the fun part, but that fun comes with responsibilities. Then run through the basic legality of flying. Point out some stupid things people have done and point out what could have happened if things really went bad and the possible fines and jail time that you can get hit with. Compare it to driving a car with no license and no regard for safety, so they can all get a better understanding of what could happen driving that way.
Then go over the simplicity of the controls and how well the drone handles wind and show it's precision. Then ask for some questions and let them know that they will be able to have a go, hands on, straight after. Then after they have had a go at flying, ask them for more questions.
Then maybe finish it off with another short enjoyable drone video and close the class. This way, you get them excited from visuals, right at the start, explain the responsibilities that come with such a fun sport, show some examples of what can happen when you do not take it seriously and don't obey the laws, to make them understand and appreciate the dangers doing it wrong, then they are explained and shown in person, how amazing the drone can fly and then get to try it themselves, get to ask questions and end it all with another inspiring video, to keep the brain excited about flying. Hope that helps.