Some meta-analysis studies that show the efficacy of Cooperative Learning in comparison with competitive or individual learning are analyzed. Efficacy is based on the following data: achievement, high levels of reasoning, time required to accomplish the task, transference of learning, intrinsic motivation, cognitive and social development, personal interactions, friendship, reduction of stereotypes and prejudices, mental health, self-esteem, social competencies, internalization of values and the quality of the learning environment. All the available data suggest that it is a strategy that can respond to the challenges that come with globalization.