This document discusses key aspects of constructivism theory according to theorists Vygotsky, Piaget, Dewey, Vico, and Bruner. Constructivism posits that knowledge is constructed by learners through experiences and interactions with their environment rather than acquired. According to Vygotsky, social interaction plays a fundamental role in cognitive development. Piaget described four stages of development and the processes of assimilation and accommodation. Dewey emphasized meaningful, hands-on activities. The teacher's role is to facilitate student understanding through questioning and group work, while students are active learners who construct their own understandings cooperatively.