Areej
Regarding the rules, you choose the ones that suit your class
Here are some of the rules I use
I speak in English
I cooperate with my friends
I make sure that every one is on task
I finish work on time
I raise my hand if I need help
And as I told you .. I keep a chart with the names of the groups . I don't just reward them for finishing their work.. but for for following the rules , also
I consider it the best way ever. Believe me, they never get bored with it.. They try their best to get more points and to be the best
They enjoy it
Regarding your last question, I rarely do it because of the lack of time
But I discuss it with them as a whole class
Wish you the best
By the way , the name of the book is
COOPERATION IN THE CLASSROOM
المفضلات