The document discusses three classic theories of learning: behaviorism, constructivism, and social constructivism. Behaviorism, proposed by theorists like Pavlov and Skinner, views learning as the formation of habits through reinforcement or punishment in response to stimuli. Constructivism, developed by Piaget, sees learning as an active process where students construct knowledge based on their experiences. Social constructivism, from Vygotsky, emphasizes that social interactions and language play a role in students' cognitive development. The document also examines how aspects of these theories can still be seen in modern classrooms.