Both books belong to one lesson and one practice, and the overall amount of questions in each lesson is similar. The difference is that one pays attention to foundation and the other to improvement.

Class exercise books are very basic, and they are all in textbooks. If the foundation is not very good, lay a good foundation first. Excellent courses, as the name implies, are used to improve. The best part is the final extracurricular expansion and independent inquiry, with more questions than classroom exercise books. If you have a good foundation and strong ability, it is still recommended to run an advanced class.