Hello Valdimir
Firstly if your son does have ADHD, then huge congratulations. It means he has a Ferrari type brain, but perhaps with bicycle brakes at the moment. The first step is understanding what his needs are and how his brain works and with new found knowledge, comes power. I coach many parents of ADHD children and once you accept the brain is wired differently and it sounds as if he has the inattentive type, you start to understand his struggle to focus in the classroom. It then becomes clearer that he may not BE BEING a problem but HAVING A PROBLEM.
The main issue is if parents and teachers don't understand children's needs, children can often quickly be labelled as unfocussed, not trying hard enough and distractible, and this impacts hugely on the way they view themselves and self esteem can quickly suffer.
If I detect signs of ADHD in my parent coaching, I gently suggest a referral to an experienced educational psychologists who should be able to confirm the signs of ADHD, but be aware they are unable to diagnose. If you do go down this as a first step, do be clear with the EP that this is what you suspect, as often they can make inferences in the report that are just unclear and lead to further confusion and lack of clarity. A good EP report helps you understand a child's cognitive profile and the results will indicate clearly if there is an executive functioning issue. After that if you want to confirm a diagnosis you'll need to see a psychiatrist and you can get a referral from your GP to be assessed at the ADHD clinic within CAMHS.
In terms of managing the symptoms, usually a combination of meds and lifestyle changes can help hugely. Every client I have coached has NEVER chosen meds as a first option, but 90% eventually go down that route and wish they had done it sooner.
My experience suggests that the meds can be tricky to get right and I now suggest to clients that they investigate doing a genetic testing kit
Genomind | Welcome to Smarter Mental Health, which is something not many psychiatrists are aware of, but can be very revealing as to why some meds are not suited to some folk.
I have huge experience bringing up a child differently wired and what I do know is that the old stigma of being neuro diverse is changing hugely, but we do need more understanding and more awareness of ADHD which is a neurological condition, but which can cause huge issues within education if not understood.
You may be interested in my book
-My Child's Different and if you are looking for some hope and optimism, you guaranteed to find it there.
Good luck and hopefully in time you can celebrate all the wonderful qualities your son will have and unlock his potential
Elaine @ The Parent Practice