I'm not sure if this has already been suggested, but I ran this question past my DH, and to him, it was 'obviously a strength in the auditory learning system.' He suggested teaching your son to whisper to himself so that he could get abstract symbols from the visual into the auditory system.

If this is the case, I would recommend some family listening to audio books to see if your son enjoys fiction more in that mode.

It also reminded me of the suggestion to build a series of PVC tubes into a device that you hold in your hand, and place next to your mouth and ear so that you can read aloud very quietly and check your written work for musicality. That might be a sanity saver for you if you are homeschooling next year.

Love and More Love,
Grinity

Coaching available, at SchoolSuccessSolutions.com