Ohhhh E., I feel your pain. My son was diagnosed with severe ADHD when he was 6. First things first, you will run into the doctors that will want to pop him on a heavy dose of medication and the teachers will cheer. You will be confronted by others who say medication is bad and how horrible it is for the child. My experience was to see what the alternatives were first, when behavior charts, behavior contracts, behavior modification, counseling, psychologist etc. did not work. I found a pediatrician who helped me with the decision to move him to meds. I also worked very closely with the school, some people will advise against this. I am a single mom and needed feedback from experienced parents and consulted directly with the Principal. (They are not allowed to make recommendations.) I just asked her if he was your son what would you do?
I am very pleased with a single tiny pill with a time release component to it. I keep him on the absolute minimum dose so that his personality shines through. My nephew was over medicated and had severe side effects to his medication and at age 16 struggles with school, despite being incredibly brilliant and has seen juvie twice, because of not being able to control impulsive behaviors and refuses to take the meds because of the side effects he remembers from being 8.
One thing about my son is that because of the ADHD he is very goal focused. I try to help him set the goal and then remind him what he needs to do to get there. I know your boy is only 6. I started mine at about age eight and it still works.
Your son probably hates school because he's always in trouble and is just so overwhelmed with the classroom stimulation that he shuts down. In second grade my son had a behavior contract that worked okay, not great. The teacher blocked out all the activities for the day and he got a happy face, neutral face or sad face based on his behavior for that time block. So many happy faces got him a reward. My kid was motivated by $ so that was his reward. With his ADHD diagnosis your son should be able to get a 504c (I think that's what it is called.) It allows him to be in alternative settings for tests and other high level of concentration activities. He might do much better in a special ed setting where he does the regular curricula, but the classes are much smaller. I know there is lots of "stuff" that goes with that, but right now you need to figure out what works, at least short term.
Also, as you work through this process of figuring out what is best for your son, you will find highly judgmental people who can't figure out why you can't control your kid and why you don't just pop him on a higher dose of drugs. You will also find highly judgmental parents who will judge you for your decision to use medication, should that be the way to go. You know your boy best. You'll figure it out, it just may take some time.
Sorry this is so long, I just want to make sure that someone else can benefit from my experiences and not have the same issues that I did. Lastly, you will want the school to do a full battery of tests, if they haven't already. They will probably fight you on this because he is so young, but make them do it anyway. You need a baseline. Maybe there is a learning disorder that you don't know about. It's important that you do not be panicked by the results. Remember your kid is ADHD so taking the tests themselves are going to be a challenge for him. My son tested at 79 IQ, auditory and visual integration issues, but this allowed us to better understand why the classroom and curricula was seemingly such a challenge.
E., just remember he's only 6. If you have to throw a year of learning away to get things figured out, it's better now than later. He can catch up easily in a year. You just don't want this to continue until 4th or 5th grade. Then you will have a much bigger challenge. You might also want to consider an alternative school setting, such as Montessori or Walden (if affordable) if your son is okay with the less rigid learning structure. My son needs structure and has to know what happens when, he gets anxious and overwhelmed without structure. Jeepers, long answer. I could probably write a book on this. E., good luck. Keep us posted.
S.