This reminds me of when I explained inverse functions to my kids. I was about to teach them to my grade 10 students and I wanted to use the Dr. Seuss book, The

This reminds me of when I explained inverse functions to my kids. I was about to teach them to my grade 10 students and I wanted to use the Dr. Seuss book, The Sneetches to give an example. I asked my kids if I could borrow their copy. When they asked me what for, I told them and they ended up asking what inverse functions were. I similarly played a game where I told them what a certain function machine did and they had to come up with a machine that undid what my machine did.