Hey! This is a topic I'm interested in, too. If you'd like brainstorming on the idea, drop me a line. My email is in profile.

My first thoughts:

- iterate more quickly by experimenting with non-computer users who aren't in prison, as letters/email to a prisoner will have a slower feedback loop

- learn what people consider to be more fun, and and try to structure lessons within that

- see if there are some existing resources that are close to, but not exactly like, programming without a computer

- set up an open source curriculum on GitHub, so people besides yourself can contribute