Generally speaking, in a very good school, about 95% of each subject can enter key classes, and 90% of ordinary schools is enough. If it is a bad school, it is about 83%.

The placement test for junior high school students is also a comprehensive survey of students' academic performance. Some key middle schools will also use this test to divide experimental classes. Cultivate students with strong comprehensive scores in the direction of winning the top spot in the senior high school entrance examination, and guide students with outstanding math scores to take the competition route.

Three advantages of separating key classes from experimental classes in key middle schools;

1, the subject teachers in the experimental classes of key middle schools are all good teachers in the school;

2. The students in the experimental class of key middle schools have gathered the best students in the school and have a good learning atmosphere;

3. The experimental classes in key middle schools have the advantage of reporting to senior high schools.

Placement exams usually include Chinese, mathematics and English, among which mathematics accounts for the largest proportion and the questions are relatively difficult. Therefore, the preparation for the exam should be considered comprehensively and a breakthrough should be made.

What is worth mentioning here is the proposition teacher of the placement exam. They are all teachers who have just sent away the graduating class of the senior high school entrance examination and come back to take the first grade examination. Then the teacher's questioning ideas will definitely continue from the senior high school entrance examination, and it is likely to be flawed to take the junior high school entrance examination with the idea of primary school.

Moreover, because parallel classes are now required, many schools have disrupted the order of classes. For example, the key class of a school is Class 5, 10, 15. Moreover, after the placement test, in order to avoid suspicion, the school will neither publish the scores nor the placement results, but will only tell your child which class is in and which class is the key class. It is impossible to take the exam, only after entering school.