Over the past few decades, advances in science and technology have produced a seemingly endless stream of new data, ideas, and knowledge, challenging scientists and educators alike to keep abreast of the latest concepts and discoveries in their fields. Adding to the wealth of new information posted online every day, more and more historical documents, books, and educational materials are being made available on the Web. To make the most of this treasure trove of resources, educators are increasingly sharing lessons, tools, and resources in electronic formats and online repositories [1]. Much like the open science movement, which promotes greater sharing and transparency to accelerate discovery, the open education movement freely shares fundamental and innovative teaching methods, initiatives, and materials to enhance understanding.