Your story made me wonder, if there was a change to the education system to the modern society, what would it be. I try to recall back when I was put into school, and remembered having little interest in the subjects that I picked other than Visual Communication that involves drawing. I figured, because we're creative individuals, it's hard for us to relate and understand the materials that we're studying at the moment. I even got Specialist Math as a subject, and I still remember thinking "What am I going to use all these formulas for? Why do we even need them?". Did I do well in Specialist Math? Not really, I barely passed, and spent my days day dreaming in class. It's weird how in school, you're taught all these subjects that seem to be a set curriculum, when it doesn't really interest us at all. When we do bad at these subjects, or not behaving the way 'other' students do, we're automatically labelled as "bad" students, and get mistreated by teachers who don't seem to understand us at all.
I wonder if perhaps, it'd be better for schools to teach about, how does an individual find themselves. What I mean by finding; how to be part of a community, helping out one another, while seeking what they want in life. In the earlier years of school you gain social/language/basic math skills, and home economics for survivability. While at middle/high school, you get to pick the elective subjects that you want rather than a set of compulsory subjects that you have no interest in. Though, this is all dream stuffs, but I like to wonder about those things heh...
Anyways, if I may say to you, you're doing a great job and you're trying your best. As you mentioned, you have goals an ambitions of learning dancing, reading books, song lyrics. Those are creative stuffs, and I can understand why you struggle with biology, it's because it's not in your interest at the moment. Why I say "at the moment" is because, it is something "new" and you're finding it hard to relate to. But perhaps one day you may find some relation to it that sparks your interest, and you'll be gulping down biology info like there's no tomorrow. Or, you could find another subject that sparks your interest as long as (like what Amanda said) you just do it, and I know you can.
Happy to listen and chat with you more Phenomenon_, thumbsup