In mathematics alone, high school mathematics does not advance much at the level of thinking, and the real steep slope effect of mathematics occurs in the second year of junior high school, when it changes from competitive calculation to geometric proof of logical reasoning, and the study of the essential function of the relationship between numbers.
The difficulty at this stage is not calculation, nor a large number of concepts that need to be memorized, but simply the competition of scientific thinking ability, but it is precisely difficult to make up for the gap in thinking ability through hard work.
Although at this stage, you can get the superficial phenomenon of performance improvement by brushing questions and training models, but the deep-seated ability gap will not be improved.
Most of the children who can't keep up with high school mathematics in junior high school are in junior high school to take the shortcut of replacing thinking improvement with model training, and they are concentrated in high school, which is not more difficult in high school, but more knowledge points in high school, and other subjects also increase the difficulty, making it difficult to have too much extra time to invest in a single subject.
If according to the normal learning engagement, students with acceptable grades in junior high school mathematics will not be bad in high school, but junior high school physical chemistry is acceptable, but high school is not, and the requirements of high school mathematics for scientific thinking are not as obvious as those in physical chemistry. Many parents think that their children's junior high school scores are only average in mathematics and excellent in physics and chemistry, and they will think that their children's scientific thinking is not bad, but this is often not the case.
High school students choose liberal arts, often because of the weakness of physical chemistry, science students have obvious advantages over liberal arts students, but after the selection of liberal arts students, the overall mathematics score of liberal arts students is not worse than that of science students, that is, the science characteristics of mathematics are not particularly obvious, and it is possible to get higher scores by brushing questions.