I don't know which school your child goes to. Xinmin Middle School, my child's junior high school entrance examination, got full marks in primary school mathematics, thinking that there was no need to make up lessons, but the grade in the first grade was a mess and even failed in the mid-term exam. She started studying in Haibi in the second day of junior high school. It seems that the teacher taught her some methods of examining questions. Now she does geometry problems faster than her classmates. Now she has finished all the application questions she was most afraid of at once. Anyway, Haibi's teachers are very organized in teaching, and they are particularly accurate in analyzing and teaching students. After three or four classes, they helped my children understand all the knowledge they didn't know before. A group of teachers who like math research are really amazing! Go and have a look.