Oh, they tried the same thing with me. Turns out I was closer to Asperger's than attention-deficit. (I'm also convinced part of my problem is that I was surrounded by a toxic social environment. I improved rapidly simply by being moved to home instruction for a few months.)
I really don't get the whole craze with ADHD diagnosis. Is it a cop-out? A way to push pills? Regardless, it's educational and medical misconduct.
Medicate children into submission.
Teaching really bright children is a challenge, especially because the questions they ask can skip from topic to topic along reasoning pathways that elude an less capable adult. (Yes, some children are that bright, challenge BS and things which make no sense, and insist on solid answers.) As children get brighter, and teachers less so, or simply lazy, anything which keeps the classroom quiet is a boon. Unfortunately, the standard approach has ever been geared to the belly in the bell curve and not the points. Since 'no child left behind', that may have shifted, but not tot the benefit of the most capable students.
Some teachers are very capable and went into teaching out of the earnest desire to teach.
Others I observed while in College were somewhat directionally muddled, often in pursuit of an 'Mrs. Degree', and decided to major in education because they just didn't know what else to go into. With an apparent increase in Socialist indoctrination and the de-emphasis on critical thinking, bright children are seen as 'disruptive' (and can be in an environment where they are easily bored stiff).