Do you find yourself running around when students are working in groups, not knowing what students need? Are you unable to prioritize needs when groups may have their hands up? This color coded key can be kept at each table, and then you simply create your own method for students to show you those colors! I use the tall holders that they have at restaurants for your order number, along with construction paper matching the colors in this key. It is a life-saver for when students are working on cooperative works, and labs in science!