A nice, efficient way to display what's important to your class. If the students are older, the teacher can write one example and the students can write their own "we do..." statement.
Ikea curtain rod and unframed photos. simple artsy photo gallery wall.
Bright alphabet crayon resist?
various art projects
Sociale vorming Ideas for encouraging positive behavior in your class.
Art Projects for Kids
Cool art project to do with the kids- one each season. Love this.