Every summer, the five core members of our teacher leadership team at Arlington Heights High School plan for the new year. We meet at places like Potbelly’s and catch up on vacations and stories. Then, we look at our “How Long ’til They Bail” list. We start making this list every spring, and by July, we usually have a pretty good idea of who among our colleagues is out. Who retired? Who quit? Who hasn’t found a new job yet and is hanging on, unhappy, with a foot out the door?