When I was in Grade Two last year, my teacher recommended English and Math 53 to us for the first time, which is standard, because the most important courses in Grade Two are English and Math. Because these two books have covered all the contents of high school, it is impossible to read them all at once, so other materials should be unnecessary. If you have to add, you can buy an article on the basics of mathematics.
As for the learning method, everyone has his own adaptation, and mine may not be suitable for you. But I can give you a suggestion: as a liberal arts student, we must firmly grasp the course of mathematics. If you are good at math in class, you will feel half safe. Don't worry if there is no big improvement in the scores of the comprehensive literature in a short time, because half of the comprehensive literature is sprinted in the third year of high school.
The most important thing is mentality. We should cultivate ourselves to have a good attitude.
Cheer for you here! ! I hope it helps you! !