What is the most logical next event?

How to get good grades as a teen without burying yourself under books
Prioritize all your work
Take brief notes during class.
Then you can read them over every night before you go to bed.
Remember, reading is not studying.
Some people assume reading a book over and over helps you to remember things; taking notes and writing bullet points is much more effective. If possible, make flash cards! Pay attention to the teacher during the lesson.