The document discusses Moodle, an online learning management system designed to create opportunities for rich interaction between teachers and learners. Moodle is built on principles of learning through creating, expressing, watching others, understanding others, and having a flexible learning environment. It allows users to communicate, store information, evaluate learning, and collaborate using "bricks" like forums, files, surveys, assignments and more. These bricks can be arranged in many ways to suit different educational needs.