In the last few weeks I have been getting in the amazing books from Dave Burgess Consulting Inc and the new IMpress. After I finish reading the books, I always go over them several times and stack them on each other. My son the other day was taking one of his toys and seeing if he could match the toy height with the books to make a tower. I asked him how many books he had to use to get them even. He went through various books trying to get the right height for the stack of books to his toy. He finally put up: Lead like a Pirate, Table Talk Math (ironically), Unmapped Potential and Teacher Myth to get he hight right for his 6″ toy. I told him good job and then asked him how many pages that was. He looked at me with an: “What?” look on his face. the later flipped to the back and told me the page numbers. So, this got me thinking of a great challenge you can do with students.