The Core Knowledge Foundation is an educational organization founded by E.D. Hirsch Jr. in 1986. Its mission is to promote a coherent and content-rich curriculum for children from preschool through eighth grade. The foundation emphasizes the importance of knowledge in learning and aims to provide resources for educators to enhance their teaching practices. The foundation offers a variety of materials, including curriculum guides, textbooks, and professional development resources. These materials are designed to help schools implement a knowledge-based curriculum that fosters critical thinking and cultural literacy. The Core Knowledge approach is used in many schools across the United States and internationally.