Hi all, I'm currently a student teacher. Next week I'm going to teach a lesson on universal gravitation to grade 11 students. It's the first lesson on the topic, so it will be an introduction and not too in-depth. I'm struggling with ways to make it interesting. I decided to start the lesson with some crazy history about Tycho Brahe, Kepler, and Newton. I also found a couple of YouTube videos with Chris Hadfield talking about gravity. However, I would like to make the lesson more interactive and I can't figure out how. I am being observed that day and my instructor will not like it if I lecture the whole time. Any ideas?