Day 51: Let Subway support your school

This technically is a free way to give back only if you're a frequent Subway customer. But if you are, here's an easy way to support your school.

1. Purchase a Subway card for $5, $10, $50, however much you typically spend there in a week or month.

2. Add your school code when you register your code.

3. Use your card and earn points for your school.