Expand children's thinking ability. Thinking development special training mathematics can expand children's thinking ability, thinking mode and problem-solving mode. The sixth grade is between the fifth grade and the seventh grade, and it is also the most important grade and the last grade in the six years of primary school (the May 4th school system is the first grade). The arrival of junior high school will keep primary school students busy. At this time, parents will also take their children to various middle schools to take exams.