Constructivism is a learning theory where students actively construct their own understanding of concepts through experiences and interactions. Key contributors to constructivism include Lev Vygotsky, Jean Piaget, John Dewey, and Jerome Bruner. According to constructivism, learning is an active process where students build upon prior knowledge and experiences to form new understandings. Teachers can implement constructivist techniques with or without technology, such as using hands-on activities, games, and video games to align lessons with students' construction of knowledge.