WordsAhead.org offers a free "map" of English speech sounds.
Vowel sounds (V-Sounds) are #1-15.
Consonant sounds (C-Sounds) are #16-39.
This springboard allows explicit sound-blending and sound-spelling of every word-to-be-read. No skipping. No guessing. Huge database to help parents, tutors, or educators.
Welcome to the forums - and thank you for an interesting link.