At what age group are you thinking? I think collaboration is a tool that can be used for good results but not all the time. I also have no idea what do you me

At what age group are you thinking? I think collaboration is a tool that can be used for good results but not all the time. I also have no idea what do you mean by killing the competition, are children sabotaging each other somehow ?2 As an example of collaboration we were a group a students that we were solving independently math problems and next day we were helping each other on the hard ones that some could not solve, the ones that nobody could solve we would ask the teacher and he was very happy that we were asking, he helped us and then give us a new list of problems to solve. This worked because we were doing this for fun and we were not forced into it, if someone would have been forced into it he could just copy the solution and done.