Top class. According to the data of the National Education Network, the perfect score of senior one mathematics is 150, while 140 is close to the perfect score, which is the top level. Grade one is a Chinese vocabulary, that is, grade one in junior high school (grade seven in the 1963 system or grade six in the May 4th system), which is the primary stage of middle school career and an important stage of adapting from primary school to middle school.