Mathematics in the second grade is certainly more difficult than that in the first grade and primary school, but it is still very simple compared with mathematics in high school. If the child's original math scores are good, it will drop by the second day of junior high school. It may be that the foundation is not solid enough, and it is a bit difficult to be flexible. It is recommended to consolidate the foundation of children. Questions that you don't usually understand must be made clear, whether they are key knowledge points or not. Never do questions for answers, but for exams. As long as all the knowledge points are made clear, it will never change, and no matter how you take the exam, your grades will not decline. Junior high school is very important, and it will be much easier to lay a good foundation for junior high school.