Constructivism is a theory of learning that suggests individuals learn best through active participation and constructing new ideas based on previous knowledge. The major theorists associated with constructivism are Jean Piaget, Jerome Bruner, Lev Vygotsky, and John Dewey. Piaget observed that children are active learners who develop cognitively through stages from birth to adulthood. Vygotsky believed social learning influences development and proposed the Zone of Proximal Development. For teachers, constructivism implies actively engaging students in lessons through a variety of methods like experiments and games.