I have seen her class is good. Although high school mathematics is the same as liberal arts, science mathematics in the college entrance examination is really much more difficult. Her lecture is suitable for liberal arts students, and the knowledge points are simple, which is the scope of liberal arts examination. Of course, it is not enough for science students to just listen to her class. They should also do more difficult questions to improve their grades. The liberal arts scope of a science student should be the foundation.