1.Coursera: Coursera is a well-known online education platform, which provides courses for top universities and institutions in the world. It covers various disciplines, including computer science, business management, humanities and so on. Coursera's courses are taught by well-known professors and experts, with rich content and high quality.

2.EDX: EDX is an online education platform jointly founded by MIT and Harvard University. It offers courses from top universities and institutions in the world, including computer science, mathematics and physics. EdX course is taught by top professors, which is in-depth and practical.

3.Udemy: Udemy is the largest online course market in the world, offering various courses, including programming, design and marketing. Udemy's courses are taught by professionals and industry experts, with rich and varied contents, which are suitable for learners at different levels.

4. Khan Academy: Khan Academy is a non-profit online education platform dedicated to providing free educational resources for students around the world. It offers a wide range of subject courses, including mathematics, science, history and so on. The course of KhanAcademy is mainly video explanation, and the content is concise and easy to understand.

5. Tang Xue Online: Tang Xue Online is a leading online education platform in China, which was jointly created by China University Alliance. It offers courses from top universities in China, including computer science, economics, literature and so on. The school's online courses are taught by well-known professors and experts, and the content is authoritative and practical.

These online course platforms provide high-quality course resources, and students can choose their own courses according to their own interests and needs. Whether you want to improve your professional skills or broaden your knowledge, these platforms can meet the needs of students.