Every subject is three or four focused sessions, and every session opens with two free minutes — so you can hear the teaching, feel whether the voice suits you, and follow whatever you are most curious about. When a series is right, it is $199 and yours for life.
The Complete Certification gathers all twelve series, your welcome letter and the full textbook for $1,499 — over $800 less than taking them one by one, and it carries the certificate. Preview as much as you like before you decide.