There are several decent homeschool-friendly dysgraphia/dyslexia curricula out there. You might try sampling some of them with your DC to see if any seem to meet his needs or appeal to him. Most of them have placement materials, so you can skip some levels, but I would suggest doing so with caution, as many high cognitive dyslexics are using subtle workarounds for lower levels of reading and spelling, and you might accidentally omit a critical phonological processing skill.
1. Nessy. This is an online, self-paced curriculum designed along Orton-Gillingham lines. It has modules for decoding and spelling, and a few other little things. Make sure you're on the US English site, and not the British English site.
https://www.nessy.com/en-us/nessy-reading-and-spelling2. Reading Horizons. Also an online, self-paced OG curriculum. There are two levels--one for younger and one for older learners. With his reading comprehension, the older learner module might be a consideration, but then again, the lower level has phonemic awareness exercises, and the older level does not.
https://athome.readinghorizons.com/store/elevate/overview. https://athome.readinghorizons.com/store/discovery/overview3. All About Learning: Reading & Spelling. Paper-based scripted OG curriculum intended for parent/homeschool. You can attack phonetic decoding skills from either the reading or spelling sides. Sometimes compensated dyslexics do better from the spelling side, as they are less able to infer their way through exercises. Excellent support and an informative blog. I love that it's designed to be used for only 20 minutes a day, two to three days a week.
https://www.allaboutlearningpress.com/4. Logic of English. Paper-based, lightly scripted OG curriculum intended for intervention with older learners or instruction with younger learners. Reading and spelling are taught concomitantly, so if your learner is at different levels with reading and spelling, you'll have to put some work into decoupling them. But if otherwise, it's a nice way to tackle both at once. Some homeschoolers use it as a core English curriculum. Online supplements and teaching helps, but no fully online intervention program.
https://www.logicofenglish.com/5. Wilson. You'll need a certified tutor for this one. This is one of the gold standard OG reading interventions, used in schools and clinics.
https://www.wilsonlanguage.com/programs/wilson-reading-system/6. Barton. Similar to Wilson, you are best off with a certified tutor, although I know homeschool families who have done it themselves.
https://bartonreading.com/
