Go into any dollar store, and you'll find rows upon rows of plastic cups. And while these cups are normally red in color, you can opt for any color you like for this teacher hack. That's because you won't be drinking out of them - you'll be getting your students to stack them as part of an educational game instead. To do this, write some math facts on paper and stick them to the cups.
You should then get the students to stack the cups and solve the math problems as they go. This is a great way to get students involved in math - even if they're not fans of the subject.