This document discusses three major learning theories: behaviorism, cognitivism, and constructivism. Behaviorism views learning as responses to stimuli and emphasizes reinforcement. Cognitivism sees the mind like a computer that processes information through sensory, working, and long-term memory. Constructivism posits that learners construct knowledge based on their own experiences and that social interaction and experiential learning help promote learning. These theories inform different approaches to instructional design.