The document discusses three main learning theories: behaviorism, cognitivism, and constructivism. Behaviorism sees learning as changes in observable behaviors due to stimuli and responses. Cognitivism views learning as the acquisition and organization of mental processes and knowledge. Constructivism believes that learners create meaning and knowledge from their experiences. The document also covers instructional design principles and models, learning assumptions, cognitive foundations of learning, and applying constructivism in practice.