Answer to Question 1
This is a learning tactic in which small heterogeneous groups of students work together and help one another master aspects of a particular task.
Answer to Question 2
Students who are deficient in the interpersonal problem solving skills called means-ends thinking and alternative-solution thinking are more likely than others to have problems with delaying gratification, making friends, avoiding emotional outbursts when frustrated, showing sympathy for others who are in distress, and suppressing impulses to violence.