Lots of great advice so far.
Last year DS's grade 1 teacher suspected ADHD-I and encouraged us to test. I was very fortunate that I had the opportunity to volunteer in the class so I could see with my own eyes what she was seeing that made her think of ADHD. TBH in our case I don't blame her, to an untrained person he fit many of the stereotypes. Many of the behaviours were things that he didn't exhibit in kindergarten or for other teachers that were better at differentiating, more organized and had better classroom management among other things.
In reality he was an incredibly frustrated 2e kid who did NOT mesh well with her teaching methods or with the high level of chaos in her class. For him the increased writing expectations in grade 1 emphasized his LD and he was extremely frustrated by that and resulted in bad behaviour. On the other side of things was the boredom when they repeated things again and again and again. It didn't help that there was another kid in the class with diagnosed ADHD and the two of them fed off each other and the teacher could not deal with one of them, let alone two.
The ed-psych read us all of her report which was hard to hear but she was able to see through all of it. We explained what we saw at home and she spent many hours with DS to get her own opinion. In the end she wrote up an amazing report that helped the teacher understand him and it helped. It still wasn't the best fit but it improved things enough to survive the rest of the year. We then advocated for a better fit this year and it has been a huge improvement.
I don't have any specific advice other than breath, explain to your psych your concerns and see what comes out in the end. Hopefully they will be able to get to the root of whatever the issue is and help him. Good luck.
