I don't know how many of you have heard of Mu Alpha Theta, but for those who haven't, it's a high school and two-year college math competition. -- Shameless plug: Middleton, my high school, won 7th in the nation in July! Go tigers! -- I'm taking Algebra 2 this year, but one of our coaches has asked me to come up with a series of one-hour lectures/tutorials for the geometry kids. I have a vague idea of what I need to cover, but I'm lost. I learned by practicing probably way too much, which isn't very helpful when presenting. Any suggestions?