The document outlines 14 psychological principles of learning according to the American Psychological Association. It discusses that learning is most effective when it is an intentional process of constructing meaning from information and experience. Successful learners are active, goal-oriented, and self-regulating. Learning is influenced by many environmental and individual factors, including culture, technology, instructional practices, motivation, emotions, beliefs, and social interactions. Assessing learning progress through diagnostic, process and outcome measures provides valuable feedback for learners and teachers.