There are spelling curriculums out there. But we don't use any of them.
I have DS6 write a little every day, which is handwriting, spelling and composition practice, all rolled into one. If he asks me how to sell something, I always have him sound it out, but then I do correct him if he goes a bit off the rails and explain why it is the way it is (or if his sounding out makes more sense than the reall spelling, then I say that the real spelling makes no sense because it's English!).
We also play the "Last Letter Game" nearly constantly.
DS6 has never had a spelling test, but he's probably about as good a speller as I am.
I don't know if that helps you?
FWIW...It sounds like your DS just really wants someone to correct his mistakes, yes? Could you ask the teacher to do this for him? Special treatment, sure, but not difficult to do...
