A "course" is a structured program of study that focuses on a specific subject or skill. It can be part of a larger educational framework, such as a degree program at a university or a certification program. Courses can vary in length, format, and delivery method, including in-person classes, online modules, or hybrid formats. Courses typically include lectures, assignments, and assessments to help students learn and demonstrate their understanding. They can cover a wide range of topics, from mathematics and science to art and business. Completing a course often results in a grade or certification, indicating the learner's proficiency in the subject.