This document explores the theories, principles, and models of learning, communication, and assessment in education and training. It discusses the behaviorism theory, cognitivism theory, connectivism theory, and social learning theory in relation to learning. It also analyzes models of learning preferences and how they enable inclusive teaching. Additionally, it examines Shannon and Weaver's model, the transactional model, and Lasswell's model of communication. Finally, it explores observational model and portfolio assessment as theories and models of assessment.