Cooperative learning is generally defined as a teaching arrangement in which small, heterogeneous groups of students work together to achieve a common goal. Students encourage and support each other, assume responsibility for their own and each other’s learning, employ group related social skills, and evaluate the group’s progress. The basic elements are positive interdependence, equal opportunities, and individual accountability. Human beings are social creatures by nature and cooperation has been used throughout history in all aspects of our lives. Therefore, it follows that cooperative learning groups in schools would be used as a logical teaching method. In this paper, I began with a brief introduction to cooperative learning. Next, I looked at why cooperative learning should be used in large classes and made some suggestions for how this can be achieved. Keywords: Cooperative learning, Effect, Large classroom, Group activities.