I created this poster to explain the CHAMPS to my class. Several other teachers used it as well. It incorporates both a 1-4 number system and/or a red/orange/yellow/green system.
The clip-art and (edited) images were chosen from public domain files, so they may not be exactly what you like, but I guarantee I looked everywhere for the best I could find.
It is made for poster size, but we also printed and laminated 8.5x11 and taped them to the desks for reference.