1. onion math can be submitted to the math APP in the textbook. I'm afraid this is the only one. The content of basic courses is the most basic concept, which is useless for students with good math scores. Of course, holiday rehearsals are also possible. Problem-solving courses are still very valuable, but they have to be paid.

2. Multi-neighbor software, which teaches you new words in sentences, can be understood according to sentences, and there are many grammatical aspects, such as hundreds of words, scallops and so on. None of this involves grammar, but many neighboring countries do.

3. scallop oral English actually, I recommend oral English, which is fluent in English, but unfortunately it does not meet the free requirements. This is not bad.

Master of Chinese is mainly used to accumulate idioms, understand ancient poems and look up words. There are not many apps in Chinese. ...

Verb (abbreviation for verb) phonetic network

If you want to practice oral English, practice and environment are very important, but you can't read correctly without phonetic symbols.

6. Beep, beep, beep, beep, beep. This is really not a number. There are many teaching videos about history, geography, politics and biology. There are also many videos of traditional culture and English pronunciation.

Seven. You can also find what you want in open courses/excellent courses, but they are basically piecemeal, and the systematic courses in them are the same as other online courses.

To tell the truth, many excellent educational software now need to be paid, that is, there is a free version, and the function is also lacking in the machine compared with paying. If you signed up for the 3000-season New Oriental, you might as well invest your money in the software to make it more perfect. If the family doesn't agree or has no conditions, you can buy books! Personally, I think the series of books on learning and thinking is very good. If your minor subject is not important, or you don't need to get high marks (for example, Kunming, with the exception of physical chemistry, all minor subjects get full marks of 60), you can master the general knowledge framework and error-prone points with Xueba Notes+Xueba Wrong Notes, and the entrance examination for minor subjects is generally not too difficult. These two books add up to enough. Of course, in some places, if the minor subjects are difficult to take the exam, you can choose the experimental class. High flyers study plan and other difficult tutorials, of course, these are knowledge points, and the most important thing is to thoroughly understand the teaching materials. After all, the books written by the Ministry of Education and used by teachers in various subjects are also good self-study materials.