Replying to Help me come up with something to teach my class

for my freshman seminar class(kinda like speech, where you get comfortable with public speaking i guess) i have to teach my class how to do something, anything thats school appropriate but i cant teach them how to do a skiing trick or anything because this has to be at least 7-12 minutes long and giving tips on how to do a trick would take like a minute. i have to come up with some ideas by tomorow. i dont hot wax my skis or tune them so i have no idea how to do that so i cant do that. the only thing i can think of is teaching them the different parts of a ski nd stuff but i dont really know too much about them so i dont think that would be a 7 minute speech and it also has to be how to do something not just explaining what something is. can someone help me think of something to teach to my class?