Out of all the things we teach, this isn’t my favorite lesson to deliver. I’m going on my seventeenth year of teaching and teach six classes a day…. that’s a lot of spheres, cubes, and cylinders. I have to say, I love using videos to demonstrate the meat of this lesson. It’s great to walk by a desk and see a student rewatching a video a second or third time. Of course, I sit and shade with my students for most of the period. In fact, I have more time to shade with them because I am not spending the class period demonstrating in front of the room. The ones “who get it” are moving along and my strugglers are able to receive one-on-one attention. The overall success rate in the classroom right now is pretty high and that is the reward that keeps me going from sphere to sphere to sphere.