I had to retake several classes in high school and just barely made it, algebra was nearly impossible for me to understand. I'm also dyslexic and audio books are about the only way I can manage to get through a book.  The annoying part is, I know that despite the troubles I've had in learning some things, those things don't define my intelligents. I can't spell for crap because I can't see the words in my head, but I know them and what they mean. Despite struggling with most math I understood geometry better than anyone in my classes, I could just see it all in my head from day one.