The perfect resource for informal assessments, teachers can pose a question and get non-verbal answers from students using these handy Thumbs Up/Thumbs Down Classroom Signs. One side features a green thumbs up sign for "yes" or "true" and the other features a red thumbs down sign for "false" or "no". These teacher resources allow educators to gain valuable insights into their student's understanding of a subject and allow them to focus on kids who might need a little extra attention. Find even more teacher resources on our website! Double-sided. Cardboard.