I have done something similar with my students, and a simple approach that works well is using a small weekly budget activity. You can set up a chart where students record any money they "earn" from classroom tasks or odd job scenarios, and then list their expenses like snacks, supplies or simple choices you create for them.
In math, they practice addition, subtraction and planning ahead. In social studies, you can connect it to basic economic ideas like needs, wants and opportunity cost. Students usually enjoy it because it feels practical and connected to real life. It also helps them understand that even small earnings need to be managed with some structure.
If you want, you can also turn it into a short project where they set a savings goal and track their progress over a few weeks.
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