Hi I was just wondering if any one has any experience of using a traffic light system? My class is very chatty. I don't want to impose total silence, so I thought a traffic light would allow them the opportunity to work quietly and be aware when they are getting too loud. I made a traffic light but I'm finding its a real faff to have to keep getting up to change it when I'm trying to work with a focus group. I've also seen these automatic traffic lights Chatter Tracker, which flash/beep when noise too high, but not sure whether to invest in one. Any ideas/experiences you have to share would be much appreciated!