I hate it when students pack up their things before the period ends, especially during instructional time. They start packing up about 5 minutes before they need to leave, and it makes a lot of noise. I've told them to wait until I dismiss class and I always give them enough time to pack up and pick up a few pieces of trash on their way out. This hasn't seemed to work though, and everyday every period of students packing up early making a lot of noise is getting on my nerves! I set my clock back 5 minutes today, but the students realized that the time wasn't correct because apparently they check the clock when entering as well and realized what I did. My school doesn't have bells so I'd be afraid to take the clock down from the wall as I might lose track of time. I'm not in the habit of wearing a watch, but this might be my only option at this point. Any suggestions?