- Contains all of the vowel sounds in American English
- Lists the possible ways to spell the given sound, with the most common spelling first
- Gives example words for all of the possible spellings of the vowel sound
- Includes all diphthong vowels
- Includes the R and the Dark L as vowels
I have been using this as my basis for teaching American vowel pronunciation for over a year, and it has proven invaluable.