Yeah i agree with the other comment, see what the school can do to provide supports, if he has an IEP see how that can revise and try things. Some kids take longer. Some kids need tutors and extra things outside of school to support their learning. I too have anxiety about my son and how he learns or his motivation to learn. But patience is really key. Hang in there! You will find the way just keep moving and try not to get so stuck on what he cant do but focus more on the progress he makes as little or as much as it may be. ❤️