Happiness is carefully rationing out your casual day coupons so you have enough left to wear jeans for the rest of the school year.
For the uninitiated, at The School, The Principal requires that we dress professionally - henceforth, no jeans. However, on occasions we will have a "free" casual day as a reward (for example, the day after parent/teacher conferences). We have also figured out that selling casual day coupons to teachers (at $5 a pop) is a great fundraiser. These things are like gold.
And the best ones? They're the ones that an admin will randomly hand to you for doing things like always being in the hallway during class changes. Sort of a reward for doing your job right.
I love casual day coupons.