<human>: Condense the text into a few key points

So, I'm currently a sophomore and last year my grades weren't great (two d's and a few c's). I really wasn't into school at all and I just slacked it off like an idiot. So, after that, my parents took away my phone, and I'm only able to use my labtop for programming or school (right in front of my mom's chair where she can watch TV and my screen at the same time). Anyways, when I started school I was so ready to do all the homework, and be organized, after I was so lazy last year. I felt so different then I did last year. Now I get home and my mother just has this weird constant anger to me over school and I do the little work that was assigned that day immediately. Afterwards she gets mad at me for not having very much work (obviously not believing that's all I had for the first day of school). She didn't care that I had been organized (wrote it down in my planer) and did the assignment. So for the first week of school, I come home, do work, and I have no privileges afterwards. I read or some shit. My mom says this won't change until the end of this semester in which, if I have a 3.5, I will regain SOME of my privileges. ~~It doesn't help that my sister has no privileges lost and she had worse grades. It's because she's a "creative learner" or something.~~ If I bring up anything about it, she just goes off on this rant about last year (she's given the same rant quite a few times). I understand why she doesn't trust me but when I tell her I want to get A's for my self, not for her, and I feel utterly unmotivated when she babysits me, she just doesn't listen. Anyways, point is, I have totally lost my motive to do good in school. any ideas? Either way I will continue to do the best I can for ME, however difficult the circumstances. Sorry for the terribly constructed question, I didn't have much time to write this during lunch.
<bot>: How can I convince my mom that I need to be able to make my own decisions, and manage my own time in order to do well in school?