As I was falling asleep last night, I awoke with a start, wondering whether we should be doing more to part company with a long term substitute. I am the principal of an elementary school, and one of my teachers went out on leave last fall for an illness. At the time, we thought that it would be a short absence, and we hired a warm body to cover the absence. However, last December we learned from the teacher on leave that her recovery would be lengthy and that she will be out through the end of the year.