"Learning by Doing" is a core principle of progressive education. This educational philosophy emphasizes that knowledge is best acquired through active participation, experience, and experimentation, rather than through passive listening or rote memorization.
Step 1: Understanding the Question:
The question asks to identify the key philosopher who championed the educational concept of "Learning by Doing."
Step 2: Detailed Explanation:
Let's examine the contributions of the philosophers listed:
John Dewey (A): An American philosopher and educational reformer, Dewey was a leading proponent of pragmatism and progressive education. He strongly believed that education should be experiential and that students learn most effectively when they are actively engaged in solving real-world problems. His work laid the foundation for activity-based and project-based learning, which are direct applications of "Learning by Doing."
Jean Piaget (B): A Swiss psychologist known for his theory of cognitive development, which describes how children's thinking evolves through stages. While his work supports active learning, he is not the primary originator of the phrase "Learning by Doing."
B. F. Skinner (C): An American psychologist and a key figure in behaviorism. He is famous for his theory of operant conditioning, which focuses on learning through reinforcement and punishment.
Plato (D): An ancient Greek philosopher who is associated with idealism. His educational philosophy focused on reason and the pursuit of abstract truths, which is quite different from the practical, experience-based approach of "Learning by Doing."
The concept is most famously and directly attributed to John Dewey.
Step 3: Final Answer:
The philosopher associated with "Learning by Doing" is John Dewey.
\[
\boxed{\text{John Dewey}}
\]