Start with pizza dough that has risen and is ready to work.
On a lightly floured surface, roll your pizza dough out to your desired size (I can usually get 5-6 Calzones out of a standard pizza dough recipe but you could easily do smaller ones for little hands or larger ones for teenagers) You'll want to roll your dough fairly thin for these because you'll have a top and a bottom on each one.
Preheat oven to 400.
Place your sauce on 1/2 of the round, rolled pizza dough. This half will be your working surface. Add cheese and toppings on sauce. One of the things we love about doing Calazones over pizza is that each person has the chance to create it to their likes. We love to cover the dining room table with bowls of toppings and just let everyone go nuts with their toppings. Don't forget you can use different sauces too (Marinara, BBQ, Ranch, Alfredo) So many amazing combinations!
Once your toppings are added to the half, fold over the other half to make a half-moon shape. Using a little water to "glue" the top and bottom crust together, you'll want to fold the crusts together so they're sealed well. Make a couple of slits in the top of the calazone for the steam to vent out. (If you're doing multiple ones, you can put shapes or initials in the top instead - just as long as you have a vent.)
Bake until crust starts to turn golden brown. Size will determine cooking time so just keep an eye on them. Normally that range is 15-30 minutes. If you like, when they come out of the oven, you can top with a little more sauce and/or cheese.