One of the good things about having a new job (I should probably write a blog post about that) is that I can recycle all of my old costumes and they're NEW. Sweet!
Super Teacher freebie patterns. You can use them with some iron on paper (buy at Target or Amazon) to make your own Super Teacher tee. Then, just pair with shorts/jeans/running skirt/fancy mesh tutu/cape and you're ready to go. If you want a fancy belt like the ones above Amazon has cheap ones here.
And . . . bonus! Come February- glue 100 beads to your Super Teacher shirt and you're ready for Hundreds Day. Confession: I might be getting lazy in my old teacher age. Although at least I made sure my beads color coordinated with the Super Tee. :)