"Version" is used to distinguish various teaching materials because the teaching materials used in different places are different. For example, the textbook published by People's Education Publishing House is the People's Education Edition. In addition, there are various versions of Zhejiang, Soviet and Shandong religions.
Actually, you don't have to worry so much about the version. Your local bookstore has screened it for you. He must be selling your local version. It's no use selling it.
According to what you said, it should be used for preview at first, so don't worry about the number of required courses. Although the progress of classes in different schools is different, it must have started from the beginning of compulsory courses, so it is good to choose the teaching assistant of compulsory one!
Just tell me which one will not be blocked as an advertisement. ! I just want to remind you: you must choose synchronous teaching AIDS, because only synchronous classes are taught class by class. You can see that those so-called leaderboards are all reviewed in senior three, which is useless to you. When preparing for or studying in senior one, you must choose a synchronous class to explain it in detail.
Yes, teaching AIDS are also classified according to their uses. For example, under the synchronous category (one-to-one correspondence with textbooks and courses), it is also divided into explanation category and practice category. If you can preview according to your requirements, it must be a complete analysis of the teaching materials, with heavy difficulties, that is, explanation. This category includes "complete interpretation of textbooks", which is a white cover with a key on it. This is also a detailed explanation of the textbook. For example, any textbook gang adopts its typesetting style and has a complete interpretation of new textbooks, which is completely irrelevant. It is said that it is the latest version of the textbook complete solution, although there are some things, but it also shows the popularity of the textbook complete solution from the side; Practice class is just brushing questions, and some of them are all topics, but also one lesson at a time, such as "Complete Learning Plan for Textbooks".
It's best to take classes together, preview by yourself, or explain in class at the same time. It's a bit unrealistic to brush the questions from the beginning. Of course, like a complete interpretation of teaching materials, there are exercises after each class, and the training needs can still be met. Because Baidu knows not to talk about links and websites, or you can read e-books. Anyway, you can check it in the bookstore.