User blog:Maria Usman/group formation in class

In the class room setting if the teacher wants to make the groups and she wants very productive performance with each student's participation. The teacher knows that there are three types of groups that can be formed one is Co-operative, Competitive and individualistic. What do you think which group strategy or may be combination of two strategies is going to work best with student of class 7. Majority of the students in the class are studious but some student are there that are dull but can work in pressure.

So I need your help in it, respond what you feel is most effective.