This flexible program, edited by Core Knowledge founder E.D. Hirsch, Jr. follows the Core Knowledge Sequence to teach key history and geography topics at each consecutive level. Teachers can purchase the textbooks in their entirety to teach the Core Knowledge curriculum. Select units can be purchased as individual books to meet specific curriculum needs. With this program, students can build a unified, solid base of academic knowledge - the key to overall literacy and future success. Beautifully illustrated pages and a friendly narrative style without distractions, keeps students motivated and focused as they learn essential content and skills.