They tried all sorts with me in school, I seem to recall it's related to trying to add shadow to hint to the brain the direction the letter should be etc. I found it more annoying than helpful. Probably a very unpopular opinion but I think teaching someone with dyslexia to read and write neurotypically is probably unhelpful and finding audio visual learning methods is a considerably better way to have them retain knowledge. I think you can get to a basic level of competency but speed and recall, at least with me, never really came. One thing I found once that was cool was an app that present each word at a time only in the center of the screen, but it felt extremely mechanical I was so focused on the words once I was done there was basically no meaning left if that makes sense. I'm autistic with dyscalculia also, FWIW. I mostly think in sounds, pictures and movies, for whatever reason my brain doesn't have a great framework for symbols that don't have those things inherently attached to them. ¯\_(ツ)_/¯