1. Constructivism is a learning theory that argues people actively construct their own understanding and knowledge of the world based on their experiences and reflections on those experiences. 2. Jean Piaget is considered the founding father of constructivism. His theory proposed that people form knowledge based on their experiences interacting with the environment. 3. In a constructivist classroom, the teacher takes a more facilitative role, while students actively engage in hands-on learning activities like experiments and group projects to construct their own understanding.