It won't last forever!! that is the good part
The bad part? I am looking back on 2016 and seeing one fairly bad year...then I look further and ask myself, "why?" The answers I'm finding are making me shrivel up in shame. Nearly all my problems can be traced back to...ME! No, I am not the whole problem, and yes, sometimes circumstance or other people played a role that I would have been unable to change, but MY attitude to everything that happened is MY fault...And sister, learn it now: your attitude, good or bad, can completely change your outlook.
So, what am I saying? Maybe you cannot change your circumstances, but you can change the way you look at them! You cannot change your mum, and you cannot change the people at your school, but you can change the way you treat them!
I know from other posts where you talk about your mum that she loves you very much, and you have to understand that love means doing what is best for someone, even when it hurts them. I'm not saying you need this, I don't know the situation. The other thing about love is that we're human and sometimes we mess it up. But if you try thinking about your mum doing this because she loves you, I think it will make it easier. Will it improve your grades? No. Will it improve the way your mum reacts when she sees your bad grades? Probably not. But you'll be able to see where she's coming from, and I grantee that will make it easier!
And as always, take it to the Lord. He sees. He cares. He understands. He forgives. And hey, you have about 4 or 5 years left, and then you'll never have to touch a textbook again if you don't want to!