1, China University's massive open online course (massive open online course) is an open platform for top-quality courses of the Ministry of Education, which provides many well-known universities' study courses, and more than 200 universities' study courses are displayed here for selective study.

2. Tang Xue Online, initiated by Tsinghua University, provides many resources to improve academic qualifications. There are many free courses, and the courses of famous schools such as Tsinghua and Peking University can be studied online for free.

3. China HowNet Many high school students, college students, graduate students and doctoral students look for information through China HowNet. China HowNet is China's national knowledge base, which contains many documents, papers, yearbooks and other resources. It is very convenient to search, read and download online.

4. Tencent Classroom is rich in content, including middle school courses and college students' vocational skills upgrading courses. Many courses can be studied for free, which is a good platform for people with different academic qualifications.

For people with different educational levels, TED platform not only needs to acquire knowledge, but also needs to constantly exercise themselves. The TED platform can take care of both. We can gain knowledge from excellent speeches, learn speech skills and improve our English listening, speaking, reading and writing skills.