Unfortuantly I have to post as unregistered since the moderator is acting like the FAA in approving my account (SLLLLOOOW)
The reason Im posting is because I'm tired of reading post from people who think they know all and try telling you what's right or wrong.
Don't let Ron scare or intimate you. I have flown for the big airlines for more then 20yrs. You would be shocked at how many pilots don't disclose information on there medicals. I'm not condoning it, however, I'm saying it happens and frequently. Don't let people try to scare you into saying the FAA will absolutely find out. In all reality, the FAA will most likely never find out. Even when you have an accident, the only time the FAA and really NTSB pulls past medical data is if the pilot is incapacitated during the incident, I.E lost off consciousness in flight, or they test and find medication in the blood, that should not be there. I Know this because i worked with the NTSB and FAA in accident investigation. I would honestly say about 1/3 of the pilots i have flown with have not disclosed a condition that could be Dqing on there medical. The medical standards are absolutely ridiculous. Another way the FAA could find out about it is if he ever suffers an injury and they disclose to the ER doctor that he is ADHD and the FAA needs those documents for some reason, or if he is receiving government benefits with respect to his condition
Your job as a cfi is to ensure that the pilot can safely operate the aircraft, not to be his medical adviser. In fact, that is not your job at all. People who say that it is your job are trying to butt their nose into business that doesn't concern them. If you can determine that the student is not becoming distracted in flight and is safely operating the aircraft, as a CFI, that is good enough.
If he does choose to disclose, that's his choice, but it will be extremely expensive and time consuming. He may not even be issued, although he most likely would unless the condition is severe.
A lot of the time children have trouble in school because they are studying subjects that just do not interest them, if aviation interests him the ground portion should be no issue.
I here a lot of people on this site reccomend Dr. Bruce. He is good, however, be advised he is very arrogant. I have co-workers that have worked with him and they will attest to that. There are a ton of extremely good AMEs out there, Dr. Bruce is just one of them.