Have you looked into the Barton Reading and Spelling Program? It’s fabulous for teaching anyone to read and spell…..I use it with my 9yo dd who is dyslexic. It includes dictation work, which is just fabulous!
I have heard that All About Spelling is a good program, though, so hopefully you’ll see improvement with time.
One of the tenets of the Barton Program is to not require the student to be responsible for spelling correctly words that don’t follow rules he doesn’t know.
So, if I were in your shoes, I would stop all writing programs ! If it isn’t asked for in the All About Spelling program (which I understand is fabulous – I have no experience with it), I wouldn’t require it.
If you want him to have practice or learn to write (meaning “creative writing” or “inventive writing” or “essays” or “written narrations”), I would suggest that you scribe for him. Let him TELL you what he wants to write and you write it all down for him. You could have him then copy it (in small segments) over the next few days if you think you need to.
Later on, when he’s got the spelling rules under his belt and you see progress, you can add the Writing Curriculum back in. Susan Barton recommends that students not read anything or do any “creative” writing until they have passed Level 4 in the Barton Program…..and I totally see the wisdom in that. Things go so much better when the student has the spelling rules under his belt.
And remember, you can do anything in your homeschool as far as accommodations, just like in public school…..so allow him to answer his tests verbally – he doesn’t need to actually write down the answers. Allow him to have word banks, etc.
Best Wishes! .