Don't be afraid of those so-called schoolmasters. They are masters of learning because they have two learning qualities that you may not have. 1 Learning methods are efficient and diligent (IQ is not a problem). As for the learning method, I won't fight here. I will say one key word: summary.
You said there was nothing you could do? I suggest you set a big goal and a small goal, that is, long-term goals and short-term goals. The goal should have the following contents: 1 is specific, and it must be specific to which step 2 is measurable, that is, it can let others check the realization of your goal. There must be a deadline.
Let me give you an example. If you are not good at math, divide it into modules, and conquer it module by module, and set a detailed goal. You said you were going to be a senior in high school. It is estimated that there has been a round of review. Then follow the teacher's steps and don't miss this opportunity again. For example, conic curve can be divided into focus triangle, ellipse, hyperbola, parabola eccentricity, fixed point fixed value and so on. And conquer them one by one, start with the knowledge points, and then find questions to practice. (A sophomore like you)
I wish you progress in your study!