This document provides an overview of growth and development theories as they relate to learners. It discusses Piaget's stages of cognitive development including sensorimotor, preoperational, concrete operational, and formal operational stages. It also summarizes Freud's psychosexual stages of oral, anal, phallic, latency and genital stages. Additionally, Erikson's psychosocial stages are outlined including trust vs mistrust through infancy, autonomy vs shame/doubt in early childhood, and identity vs role confusion in adolescence. Key theorists and their stages/conflicts are summarized to provide context on understanding learner growth and development.