Feeling Blue

I feel a little blue today. I'm not sure why. It was a really easy work day. The kids worked independently while I worked on some much needed grading. I tutored this afternoon (brings home a couple extra hundred a week, so it's worth the extra time), but didn't have any kids who needed help, they just needed a paper from me that I don't let them take home. Mitch probably just fixed the sceptic problem that we were told would cast $600 for the cost of a gasket. I slept in until 7 because tutoring wasn't going on this morning. See, pretty good day. So, why am I so blue?