Walker, I was the same way. By the time I pressured my mother to send me to a Catholic all-girl school (which was fantastic) I was 15 years old and so far behind that I sank quickly. I didn't know how to ask for help there, and my so-called study skills from Scientology were useless. For example, I didn't know what a topic sentence was or how to write an essay. Math was a joke.
Sadly, I asked to leave before the semester was even over. I was very depressed to discover that I was so stupid (not understanding that basic intelligence had nothing to do with it). That was the entirety of my High School education. I regret it to this day. And guess what I did upon leaving? I immediately joined the Sea Org -- the only place I had a future.
[edit: that's what I thought at the time, not what was true, of course.]
Somebody has to speak for these people.... no more running. I aim to misbehave.... If you can't do something smart, do something right. (Serenity)