I have a daughter who is 11 years old.She is in Y7 at a grammar school and is doing Ok (above the middle of the class in all subjects), but she can't spell at all.She will just as often write 'mutch' as 'much' and 'wich' and 'dans' for witch and dance as further examples.At least 50% of her words are spelled incorrectly, although phonetically plausible.
She can read Ok although perhaps slightly slower than average, but not significantly, and she does enjoy reading so it can't be too much of a chore.
The other thing she has a big problem with is copying from the board because as she says she cannot remember many words in her head.This is particularly problematic in French because she needs to get the spelling of each word so has to look every few letters.
The school have told all her teachers to mark the content of her work and not the spelling and have sent her to 'spelling club'.I don't think this is very helpful because she knows the phonics but can't remember which spelling of that sound to use eg 'ir' 'ur' ' or 'er'
I don't know if anything can be done to help her, I don't whether this is a form of dyslexia.The primary school didn't care because she was 5a across the board and sat 6 in writing and they would understandably rather spend their resources on a child who was 'behind'.
French spellings are something she is really struggling with