Piaget attached great importance to the role of social communication in children's psychological development when he studied the development of children's language and thinking and children's moral development in his early days. He believes that in children's cognitive development, interaction with others is as important as exerting actions on objects. The development of children's intelligence needs mutual stimulation with others. This communication not only refers to the communication between children, but also exists between teachers and students. Piaget attaches great importance to communication in the sense of "cooperation". He believes that the focus of communication in learning should be cooperation among children, not competition. He regards social communication in cooperation as a part of promoting the all-round development of children's personality, that is, a means of intellectual and moral development. He believes that individuals can never integrate their actions into a coherent whole without ideological exchanges and cooperation with others.

Although Piaget thinks that thinking begins with action and language is not the source of logic, he does not ignore the role of language in children's cognitive development. He admits that language plays an important role in the process of internalizing actions into appearances and thinking activities, and language helps internalize actions, symbolize and formalize cognition. The finer the thinking structure, the more languages are needed. Advanced computing structures are actually expressed in language. Language is also a tool for communication. Therefore, social communication can help children get rid of the self-centered state, make their thinking fine, and also help children get rich information from others. And cooperating with peers and learning from each other can brainstorm and make the learning effect better.

All educational experimental programs under the guidance of Piaget's theory attach great importance to social communication and emphasize "peer teaching". Children can talk and discuss with their peers in class.