1. The interaction between people in the groups of different ages in cooperative learning was found that in the past the people interacted with each other well. Their lifestyles were simple, as they depended on each other, shared knowledge, and transferred wisdoms from generation to generation. However, in the present people less interact with each other because they have so high mental stress that the consideration to find out the fact to create choices decreases. It influences them to choose the right choice more difficultly. Consequently, there were problems such as skipping age, family’s trouble, and lower family relationships.