First, few requirements to take an open course. Also, we are taught complex theories in online classes. Then, we may need to do more or less activity to learn the same material as classmates. Hence, different levels of knowledge to start off. Next, assignments to do for understanding a Mooc. Given, good netiquette to study what we have done. So, do use homework to replace text books. As a result, we learn from text.
It follows, homework contains the concepts the course conveys. Then, exercises that accompany lectures. After, quizzes keep content in our memory. Plus, graded tests periodically to make sure info is retained.
Then, course providers give lectures. As a result, test our understanding of presented material. Also, provide an example students can follow. Hence, we learn from an instructor.
Then, schools use slightly different formats. Therefore, basic structures of courses are the same. Thus, homework, quizzes, and tests. Tests get a grade. Also, timed. As a result, books are not a requirement.
Hence, online resources come from the school. Additional internet resources, links, provide more information. Traditionally graded tests are extensions or preparation for assigned work. Now, provides references similar to textbooks.
Study homework because assigned work replaces textbooks.