Harvard University offers a number of free online courses through its HarvardX program. As of June 2015, classes offered include those on the topics of biochemistry, health care, computer science, early Christianity and the history of China.
In 2012, Harvard joined forces with the Massachusetts Institute of Technology to create edX, a non-profit that enables anyone with a computer and Internet access to take online classes through participating colleges and universities at no cost. Both traditional timed courses and self-paced classes are available.
Harvard offers a variety of courses, including some that provide students with the opportunity to receive a verified certificate of completion for a small fee. The HarvardX website maintains a list of all archived, current and future courses for interested individuals to review. Students have the option of auditing any of Harvard's current classes or those of any other edX institution.
Classes have included those such as Introduction to Linear Models and Matrix Algebra, Poetry in America: The Civil War and Its Aftermath, and Central Challenges of American National Security, Strategy and the Press. The classes are taught by instructors and utilize lectures, videos, quizzes, labs and other tools. Students may even interact with each other via discussion forums.