I love All About Spelling. I'm also tempted by the Logic of English, which has a similar OG-inspired design, but integrates handwriting (at the lowest level), reading, and writing, as well, though I'm already so invested in AAS, that I'm not about to change now. Plus, my kiddo is much further ahead in reading than in writing/spelling, so having them separated works better for us, anyway.

...pronounced like the long vowel and first letter of the alphabet...