1, subject difficulty: Mathematics in Grade One of Senior High School covers more contents, and the difficulty is gradually increasing, and the chapters are more difficult.

2. Changes in the learning environment: the learning requirements and examination evaluation are also stricter. The learning content in junior high school is less, and the knowledge points are relatively basic and fixed, while the mathematics in senior high school pays more attention to the investigation of thinking ability and application ability, and the examination requirements and evaluation standards are also stricter.