Online courses are online courses that are learned by electronic devices through the Internet. Different from offline classroom teaching, online classroom has the advantages of various ways, flexibility and convenience, and more and more students and parents are beginning to use it. Online classroom is a new way of learning, which is a series of learning tutorials provided for learners based on the Internet, including video, pictures, text interaction and other forms. Online courses are online learning courses provided by service organizations. Different from offline classroom teaching, online classroom has the advantages of various ways, flexibility and convenience, and more and more students and parents are beginning to use it.