Concept:The saying "We learn by doing" comes from the educational philosophy of Pragmatism, which stresses learning through direct experience.Explanation:Among the given choices, Simpson is the one who promoted this principle.Learning by doing requires students to interact with their environment and practice solving real-life problems.It combines thinking with hands‑on action, helping students develop self‑learning skills, emotional growth, and practical knowledge.Therefore, Simpson is the correct answer.Answer:B. Simpson