Have you ever taken a moment to really think about the dirt and germs on the desks in your classroom? Of course, you're better off not thinking about it. But if you want to get rid of these germs and breathe new life into your desks, you might be interested in knowing that shaving cream works wonders. You can pick this up for cheap at the dollar store, and then squirt it all over the desks.
When you wipe the shaving cream off, you'll see that the desks are as good as new. You could even get your students to help out if you wanted to!