If your community has access to companies like Postmates, UberEats, and Doordash, these companies offer gift cards that can be a great way to reward students. there's also Target, Kroger, Walmart - you name it!
There are so many ways to build points into this reward. You can make this a high-value item in your school store, or give it to the highest-earning student in your class. They can use the gift card to redeem a special delivery for lunch or a fun activity they can share with their classmates.