The difference of difficulty and the connection before and after. The difference between the math problems in the senior high school entrance examination in People's Education Edition and the sixth grade is slightly more difficult, and the relationship lies in connecting the preceding with the following, from the simple problems in the sixth grade to the difficult problems in the senior high school entrance examination. People's Education Edition is published by People's Education Publishing House. This version of the textbook is available from primary school to high school. It is also a textbook used by most schools.