1, miracle class (suitable for people who have a good foundation but can't do it too hard. Some questions are more difficult and basic, which are suitable for exams. Almost within the difficulty of the test paper).

2. Peiyou classroom (it seems to be called this name. The cover is red and blue. I used it. It's not basic, but it's rare and not outrageous. Suitable for learning and spare capacity for altitude training. Personally think it is more difficult than the big test paper).

3, big vision (many top science students in junior high school classes are using it. I heard it's hard ... it should be a game.

For different concepts, we should adopt different methods:

Some only need to implement concept teaching in example teaching. For example, the concept of relevance is descriptive, and there is no need to pursue formal rigor. It is suggested to adopt case teaching method. Compared with the functional relationship, it highlights two essential characteristics of the relationship: relevance and uncertainty.

Some first introduce the background of the concept, and then let students perceive the concept and extract the essential attributes through the obvious and intuitive examples related to the concept.

Some should contact other concepts and use multimedia and other auxiliary facilities for intuitive teaching.