Methylphenidate
"I couldn't be happier with how this drug has helped my daughter.  She's been taking it for 8 months now, with absolutely no problems.  We tried 2 doses of 4-hour methalyn first, but it just didn't seem to help much.  She's getting all A's in school and will actually be tested for the 'gifted' program next year because of this medicine allowing her to focus and concentrate on her school work.  The only 'slight' con I have is when it wears off, she's a little moody, but she gets over that quickly."