We call these curriculum materials “Alexandria Plan” because we enjoy thinking about the role that they—and the teachers who use them—play in passing along important knowledge to future generations. The Library of Alexandria in ancient Egypt and its associated museum formed the greatest center of learning the world had ever seen. The library sought to collect and catalog “all the knowledge in the world.” It became a center of learning, attracting scholars, philosophers, scientists, and physicians from all corners of the earth. Though it fell to fire, the spirit of Alexandria remains. Some 2,300 years later, a new library stands near the site of its ancient ancestor, and the story of Alexandria and its Great Library inspires our efforts to help teachers illuminate the future by inculcating in their students an understanding of the past.