Class auction idea- Vintage reclaimed wood sign - I imagine the art teacher painting the flower and all the children's names being written in as part of the fine black lines (can't see it unless you look real close.
Great New Year's idea: Start the year with an empty jar and fill it with notes about good things that happen. Then, on New Years Eve, empty it and see what awesome stuff happened that year. Good way to keep things in perspective.
Teeth whitening treatment at home. Put a tiny bit of toothpaste into a small cup, mix in one teaspoon baking soda plus one teaspoon of hydrogen peroxide, and half a teaspoon water. Thoroughly mix then brush your teeth for two minutes.