Honestly, I don't really know. I've been trying to figure this out over the past couple of weeks and am starting to think that the answer to how to teach some of those things is not to (or at least not from the start). When I look at all the knowledge I have built up over the past 10-15 years, it's kind of overwhelming to attempt to identify a place to start. But when I think about how I got started programming, it was much more organic. I saw little bits of code around the web that did something that interested me, and then I just played with it to see if I could get it to do something slightly different. In the process I certainly learned about things like variables, logical constructs, loops, etc., but it wasn't until later years (and after firmly solidifying my interest) that I started a more formalized education in computer science.
Most of the students are very interested in writing mobile apps. While I would love to jump right into that, I don't know if we would get very far in one hour a week. So currently I'm just trying to provide some "exercises" that let them get their hands dirty with programming and maybe lead them in the right direction towards the type of programs that they are interested in writing. Then on their own time they can pursue things further, and I'm always available to answer questions or help solve problems they run into.
What are your thoughts on this?