Senior one and senior two may mainly be the knowledge points of a module class, and the reference books bought can be synchronized, but senior three may choose one suitable for general review or mock exam. If you use comprehensive reference books in senior one and senior two, it may be counterproductive.
Matters needing attention in high school mathematics learning
The biggest difference between high school mathematics and junior high school mathematics is that there are many concepts and abstractions, and the "taste" of learning is very different from the past. The method of solving problems usually comes from the concept itself. When learning a concept, it is not enough to know its literal meaning, but also to understand its hidden deep meaning and master various equivalent expressions.
For example, why the images of functions y=f(x) and y=f- 1(x) are symmetrical about the straight line y=x, but the images of y=f(x) and x=f- 1(y) are the same, and why f (x- 1) = y?