I got this email question with my response below:
Q. [On the topic of creating a CI based curriculum]…I just sat down and asked myself what students would need in Level I if we were just concentrating on them. So I came up with the personal interview questions online, and from there, wrote a list of grammar items that we would naturally deal with as far as possessive adjectives, etc. are concerned in the focus on them personally. And now I am going to do the same thing for the other levels. So in a way it is topic-based , but hopefully in a way that seems natural to them.