I went back and looked at your intro thread - if you haven't had your ds go through a neuropsych eval yet, I think a consult with a private neuropsych would be helpful, both in understanding more thoroughly what might be at the root of the discrepancy in PRI vs VIQ (which will help you understand how to address challenges) and also in helping you learn about what resources are available in your area to help with schooling.
FWIW my ds is a visual-spatial learner with many (but not all) of the symptoms of dyslexia. I can totally see my ds not remembering how to find his classroom! When he was in 3rd grade we consulted with a tutor who used a visual method of teaching how to spell. I wish I could remember the specifics of her approach so I could explain it to you, but it's been to long ago for me to remember - it did work for our ds, but otoh it didn't make him a good speller either. He can know how to spell a word and still isn't able to spell the same word when he's in the midst of composing written expression so we eventually gave up on worrying about spelling and provided him with accommodations for spelling so he could focus on written expression (which is also a challenge for him).
Best wishes,
polarbear
