Now junior high school physics and chemistry, light thinking and heavy memory, as long as you are willing to learn, it is not too difficult, there is no difficulty sharing of these two subjects, only mathematics is a science subject, and the gap in scientific thinking ability is not obvious.
Some even study physics and chemistry in advance and then concentrate on mathematics. The reason why you can learn materialization in advance is not how smart these children are, but that these two disciplines are really simple.
Even if there is only one difficult mathematics left, it is very simple and very simple, and the difficult is particularly difficult, either it is sent to the pocket, or it is difficult to be difficult, the degree of discrimination is not obvious, and the difficulty is related to the knowledge points, most of the sections such as inequality, trigonometric functions, probability and statistics, are simple questions, and some knowledge points such as factorization, exponential and power, intersecting the theorem, can be out of the section of medium discrimination, not as the focus.
The difficulty of mathematics focuses on the geometric proof of circles, as well as quadratic functions, the difficulty of these problems is not reflected in the difficulty of thinking, but the complexity, and has very obvious model characteristics, when other disciplines and other sections are not difficult, some chicken babies have enough energy to practice these two sections of the model to the extreme. It makes it more difficult for students who rely on independent thinking ability to think out at the time specified in the exam than for students who memorize and practice various models.
The difficulty of junior high school mathematics can be divided into the last 50% of students who are not smart and do not work hard, but for the top 30% of students who are promoted to key high schools, there is no difficulty bonus of other subjects, and the difficulty section is concentrated and biased towards modeling, which cannot play a role in selecting the best.
In high school mathematics, the steep slope effect is not obvious in terms of difficulty. The reason why there are many high scores in mathematics in the high school entrance examination, students who can make all kinds of finale questions, and the big decline in high school mathematics scores is that the difficulty of physics and chemistry has improved, and the learning of mathematical functions has progressed, and the analysis of specific problems and problems is required, and the model cannot be set, there is no large amount of extracurricular time, and the difficulties are scattered.