Concept:The project method is a student-centered teaching approach rooted in progressive education, using real-life projects to promote active learning.
Explanation:William Heard Kilpatrick, an American educator, introduced and popularized the project method in the early 20th century.
This method focuses on student interests, allowing them to choose projects.
It integrates multiple subjects and emphasizes real-world relevance, collaboration, and the learning process over the final product.
Other educators like Stevenson, Armstrong, and Thorndike are not associated with introducing this method.
Answer:C. Kilpatrick