Youth Change Workshops"Common Sense Caution School Poster Stops Problem Behavior" (Poster #549) This school poster is a must-have for anywhere students misbehave or there are classroom management problems Funny poster created by teachers and counselors to work better than conventional methods Bright yellow sign says Caution: Common Sense Required Past This Point Humorous poster has proven track record of producing better behavior and judgement Medium size poster on glossy, medium weight poster stock