I've been teaching how long?

There was an article in the local paper this morning about an event last night at the high school for the incoming freshman to get to know the school. I was looking through the pictures when it really hit me that these incoming freshmen were my first 5th graders. I can not believe that I've been teaching long enough to have former students heading to high school in the fall. I seriously do not know where the time has gone, and I'm not sure I approve of how quickly it has left. That is all.