So here is what I did. I took 3 solo cups available at any store in the colors of red, yellow, and green.
Each table had this color combination set on their table. As they worked and stayed on task the group would remain on green, once they got a little off task the cup was switched to yellow, and then if they continued to stay off task the cup was turned to red and then they were directed to work with me to finish up their work .
If you are looking for a packet with a great group work activity in it check out my 3 states of matter packet where students take on the different roles of the story and come together and discuss. Click on the picture below to check it out.
Have a great week.