i have some smiley stickers,
(i have prepared on my own, not the ones they could provide wherever they wish)
but first, i gave my pupils a sheet including empty squares,
when they keep responding the rules and get with each other politely,
they earn one sticker that day. (the best ones two)
they try to act smarter more in the groupworks.
(sometimes i ask myself that if this is right or wrong what i am doing but it reaLLY works and the more important is that the idea was suggested to me by British Council.)