There are many factors that lead to poor math scores in senior three. For example, formulas and concepts are clearly remembered, but they cannot be integrated when solving problems. In addition, the foundation may be poor. Generally, senior three students will have many different problems in their studies. If you want to choose a winter vacation remedial class, don't ignore these aspects: first, when choosing, it depends on whether the teacher is qualified; Second, you should see whether the remedial class has the qualification to run a school; Third, you should look at the average effect of promoting students in the previous two years.