I don't know about your students, but from time to time I catch some of mine daydreaming and staring off into space. I always do my best to refocus them immediately. However, I'm sure a minute or two may go by before I grab their attention again. Because of this I am a big believer in hanging LOTS of instructional posters and signs. This way, when they are staring off into space, they hopefully will notice a colorful sign and read it (and ideally remember it!). I may go a bit overboard with my posters, but I think it's worth it. Here's the biggest wall I have:
I also have lots of toppers over my whiteboards. Here's the right board:
And here's the left one:
I'm not quite finished, but it's definitely getting there! In the past, I used Fun Tac to hang all my posters. It was really frustrating though because most of them would start to fall by October. This year, I got Velcro coins. So far, so good. Hopefully they will stay up all year and next year I'll just have to stick them to the Velcro that will already be on the wall. It will be such a time saver!