答案

Compared with the other two options whose effects are less noticeable, a home tutoring session may have the most direct and vivid result to students. Firstly, it solves the problems not completely digested in class. Understandably, the teacher has to cope with tens of students at the same time, and even if sometimes several students cannot fully understand the teacher, the teaching process cannot be delayed. With the help of private tutors, the several students can, at least, make sure they keep up with the progress of the whole class. Moreover, it makes a solid foundation with comprehension of what is not taught in class. Take my brother for example. He has already been superior to others in class, but to ensure his entry into a terrific university after secondary school, he needs a private tutor to prepare him a more solid foundation