Clean and organized! As a principal, I loved walking into a room that was easy to navigate, organized, and not overwhelming. Less is Best when it comes to kiddos and feeling overloaded by all the visuals in the classroom. To me, it is their room and everything should have a purpose and they know where to find what they need. :)
Also, they need to be able to read it from "far-away." So, I put two on one-page. Just print, laminate, and cut!