So, I have a few ideas ......... As far the move goes, I would try to not talk about it very much in front of him. When he does here you talk about it, just make it matter of fact, and exciting. Like "It will be so great to be with Daddy again in our new town. We can go on adventures and learn about our new place" - things like that. I would also buy a few books that can help ease the transition and help with worry: Here are a few ideas:
Homeschool.......well, I tried it with very little success with my very ODD daughter and found it created more battles than it solved. Also, my daughter struggles socially and I found removing her from school alienated her even more, and frankly I couldn't hack the school work battle with her.
It may work for you guys, but it may not (you don't want yourself going completely bonkers!!).....
Your son should qualify for an IEP and specialized services through the school district because of his diagnosis. Now, depending on where your moving, services can vary, but he would be entitled to some. IE: Extra time taking tests, 1 on 1 additional help, preferential seating etc......
Here is a helpful link to look at regarding school:
Well, it seems as though something is going on - especially because you note, he is repeating 3rd grade.
I think it would be in your step-son's best interest to have the school district test him (at their expense) and find out exactly what is going on.
You will need to request in writing to the Principal of his school (it is a public Charter school, right?), and they have by law 60-days to respond. After all the testing is done, you should then have an idea about what accommodations the school can offer your step-son so he can succeed and feel good about himself.
There is a lot of info on this - so you'll need to do some research and talk to people, but the first step is to write a letter requesting the testing.
Just a side note here ...... getting an IEP for your son doesn't mean he will be in "special ed" necessarily - it just means the school by law must provide services and devise an education plan specifically for him.