ESL Instructor to Review my ESL Curriculum

I am building an app that is going to help people with their English pronunciation. I currently have 400 words in my curriculum but I am thinking to increase this. My app teaches 40 basic phonemes of American English and combines these in certain combinations, which I think are adequate to improve the average ESL learners pronunciation. I want a professional review of my curriculum done and assistance to make sure my curriculum covers the basics of English. My app is not supposed to teach you vocabulary, it is only to teach you pronunciation.