This website brings together excellent courses from major universities, many of which can be studied for free, and many elective courses in universities are also conducted on it. Some courses have exercises to consolidate knowledge after each class. This is a very good website!

2. I want to teach myself.

No matter what software you want to learn, you can find tutorials on this website. There are software tutorials from all walks of life, both entry-level and advanced, and you can watch them for free!

3. Khan Academy

This is a foreign self-study website with a wide range of courses, including humanities, science, economics and other courses. All courses are open and free, taught by famous foreign universities, and the quality is guaranteed!

4. The exam is cool

This website provides a permanent and free system cloud platform for electronic homework and online exams, and its public question bank center provides a very rich question bank, which can be consulted and tested for free. The question bank is also classified in detail, including foreign languages, computers, accounting, medicine, civil servants, postgraduate entrance examination and many other fields.

5. University Resource Network

This website is a completely free online learning website, which provides a very rich and comprehensive video tutorial. It covers all university courses, foreign language courses, computer network courses, postgraduate courses and other video courses, and all tutorial videos can be played.