Try flunking school. It today’s age, they’ll never keep a student back another year because its way too TRAMATIC. That would ruin the kids for good. They’ll probably give you a B just because it makes the school look bad if anyone scores lower.
Good luck! Most of what your learning now makes no real difference in the real world. Unless you want to be a doctor(science) or a contractor(geometry).
The whole school system is meant to prepare students for college, s/t very few in our community will even attempt.