Pizza is important in Darin DeNeal’s seventh-grade math class at Pendleton Heights Middle School. Not so much for eating, but because it’s a practical way to engage 13-year-old minds about how the science of numbers affects their daily lives. The lesson might typically begin with this question: Is a 16-inch pizza twice as large as an 8-inch pizza, or four times larger? Many adults reading this might say it’s twice as large because 8 + 8 = 16. Right? But students in DeNeal’s class would be able to tell you why that answer is wrong. One 16-inch pizza has roughly the same area as four 8-inch pizzas. Why? Because a pizza is a circle, and the area of a circle increases with the square of the radius