These are subject-specific courses recorded by expert scholars, professors, and teachers. The courses are organized in a series based on subject matter and level. The course duration varies depending on the subject’s importance and depth, but typically, each video class is under 15 minutes long. In these classes, students will learn all the concepts of the topic. At the end of each video, there will be a set of quizes to assess comprehension. Students must successfully pass the quizes to achieve course certificate.