teenage horror movie

She's Jekyll and Hyde, I'm telling you. My daughter is so sweet, and loving one moment. And the next, she's auditioning for the Linda Blair part in the Exorcist. What's scarier than that is that one day, the sweet side may be gone forever and I'll be left with a sassy, disrespectful teen. She started school yesterday. But, bless her heart, she does appear to have some type of learning disability. We saw doctors and reluctantly tried Adderall for ADD/ADHD. But, there was no change in her after 6 months, so we discontinued the medicine. She's not stupid by any stretch, but has trouble processing the skills of learning. For example, if I tell her to do 1, then 2, then 3----she may go directly to 3 and swear to you later that I never mentioned to do 1 and 2. This isn't occasionally; this is always. Testing has proved she's above average intelligence and teachers told me she was a classic ADD case, but I don't know what to do. Her grades are poor, so it's important for us to find a solution. Does anyone else have any suggestions? That's another thing I like about weblogging.....you can get lots of good input from people.