Let's review the exercise of tongue circles around the mouth to hit each vowel and also add the last 3 moving vowels, or diphthongs. Part 3 will cover reverse tongue circles.
For the full lesson on vowels see my courses on Udemy.
https://www.udemy.com/course/american...
https://www.udemy.com/course/vowelsf...
https://www.udemy.com/course/american...