I had a little area where I would take up phones and keep them for the remainder of class if they became a distraction for students. This was the label I used for it.
I created this poster/flier so students would remember to clean their paint brushes and palettes before putting them away. It's pretty flashy and is good at catching their attention!
A poster/flier I made for my art classroom, though it can be used in any classroom. Students need to always have an easy-to-access reminder of the norms of the class!