The document discusses the constructivist learning theory, which is based on students constructing their own understanding by building upon their prior knowledge through hands-on experiences and interactions with teachers and peers. It outlines the key contributors to constructivism such as Piaget, Bruner, Dewey, and Vygotsky, and defines important concepts like the zone of proximal development. According to constructivism, the teacher acts as a guide to help students build knowledge through questioning and scaffolding learning within their ZPD, while students take an active role in constructing meaning from experiences and problems.