We utilize the Happy Kid Lunch Program. 
Below are instructions and information regarding the program. You must create an account then you can either deposit funds to allow children to select items or you can pre-order lunches and pay directly for them. 
Please note, when setting up your account that walk up funds do not cover preordered selections. If you deposit funds to the walk up option that allows your child to order lunch or snacks and they get billed against those funds.
If you are preordering lunches, payment is due upon order. However, you can order for multiple days, weeks or the entire month.

Happy Kid Lunch Program