Time in a Bottle

I arrived at work at 7am. Since then I taught Interior Design I, my new foods class ProStart, had lunch, prepared for next weeks classes and I am now half way through Interior Design II. The perplexing thing is that since I arrived at work only 10 minutes have passed! This is going to be a very long 8 hour work day. Or else I just need to replace the batteries in my clock. Boy oh boy, I hope its the batteries!