Today in geometry, to get students thinking about the concept of transversals, we did Andrew’s “Transversals, Tape, and Stickies” investigation. Simply put, it was fantastic. The discussions it elicited between students were great, and they all were able to solve both problems. They got really excited when they solved the one with the 3 intersecting lines, since it took them all several attempts to figure it out. Once they began finishing, I tasked them with creating their own puzzles and trading them with other groups. They got really into this too and were totally engaged and enthusiastic for the entire period. It was a lot of fun.