approriate behavior or no?

i walked into my boys' class, a day before their 3 week vacation. walked in with s-boy only because the m-boy was sick. their teacher shouts out in the middle of the class: m-boy has been "misbehaving lately, getting out of control". i felt so embarassed for him, as she said this in front of his class. what was i supposed to do about it? i send him to school a happy boy and i teach his math, i read to him, ensure he behaves as well as a 6 year old boy can. i am just stuck, flabbergasted. this is the boy that does have a problem focusing, but when he focuses man he is a demon...he will write a 10 sentence story, make amazing paper airplanes, finish 3 books in one sitting, do whatever task i give him...when he focuses.

what am i afraid of? i do not want to find out that he has adhd...i do not want him drugged with ritalin.

how can i help him without resorting to medication? i have to help him though, no one helped me when i needed it as a kid...i used to do so badly in school because i could not focus on anything. i thought that i was stupid, in retrospect, i realize that i merely could not focus.