I give each student 2 cards for my 30 minute counselor lesson. When a student answers a question or makes a comment, they turn their card over (or they hand it to me) indicating they've had a turn to talk. If a student blurts out, I have them give me one of their cards. This helps them stop and think the NEXT time they are tempted to blurt out.
Before each lesson, I always comment about how as a class, we are practicing taking turns TALKING and taking turns LISTENING. When students have all their cards turned over, their turn to talk is over and it is now their turn to be good listeners. I don't use these cards in every classroom. I use these cards mainly in the classes that need reinforcement in this area.
This product can be found for $1.00 in my TpT store. These cards come in color, ink friendly color, and black and white versions. Click HERE to see more details.
Have a great day!