Online courses are educational courses that are conducted entirely over the internet. These courses typically involve watching video lectures, completing assignments, taking quizzes, and engaging in online discussions with instructors and fellow students. Online courses are often offered by universities, colleges, and other educational institutions as a way for students to learn new skills or earn academic credit from the comfort of their own homes. These courses can cover a wide range of subjects, including math, science, language, history, and more. Students can typically work at their own pace and schedule, making online courses a flexible and convenient option for those looking to further their education.