Pizza is a fun theme to do in preschool, pre-k, and kindergarten. Kids LOVE pizza! Research tells us that kids learn and retain the most when they are interested and invested in what they are learning about. The group I have this year would order pizza everyday for lunch if their parents let them which told me pizza was a prefect theme for this group. My pizza theme lasted about one month in my preschool classroom and we also did a shapes unit during the pizza theme as well. Shapes was the perfect math unit to teach during our pizza theme. There are shapes all over a pizza restaurant (toppings, slices, boxes, cups, sign, pans, etc.).