If your daughter had diabetes, and doctors said she needed insulin, would you let her have it?  If she was diagnosed with high blood pressure, and the doctors said she needs meds, would you let her have it?  Before you do start her on anything, I would get a second opinion--preferrably from a psychiatrist who specializes in ADHD.  My son was the kid who disrupted the class, ripped up his papers if his teacher offered any criticism at all, and stayed in trouble because he couldn't stay in his seat.  Within two weeks of being on ADHD meds, he finished each and every assignment promptly and correctly, was able to sit in his seat and listen to everything the teacher had to say, and listened patiently if she pointed out any mistakes on his schoolwork.  If she is placed on medicine, and she is able to concentrate--alleviating anxiety and stress caused by her inability to keep her mind on subject--then won't she be a happier person for it?  And obviously, if she is able to concentrate without stress, then she will want to stay in school and learn.