Is your son in primary school or junior high school or high school? High school math score 150, primary school full score 100. If your son is a pupil, this score should be regarded as an excellent student. If you are a high school student, it depends on the difficulty of the topic and the ranking in his class. If he is the highest score in the class, even if the score is 150, then he is a high level. If he is far behind in the class, then he is a low level. If it is a high school, you can't see what level he is just by looking at his grades, which has to be compared with other students in the class. Only contrast can tell!