Show HN: Prototype for a Collaborative App for Leading an Intro-To-JS Class

Source: https://github.com/katzgrau/hour-of-code-developer

I was set to give a 20-40 minute intro to "coding" at two local high schools, and it struck me that it'd be really handy to have some tool where students could run/modify pre-written code snippets, share them with the instructor, and perhaps actually feel like a real developer. I hacked up an initial concept and used it for the classes yesterday and today: http://hoc-developer.herokuapp.com/

Right now it's insecure, the code's sloppy, and there's no MVC structure or framework since I was doing it as a last-minute thing.

For anyone that teaches/leads classes/bootcamps, do you think something like this might be useful to you if it were more robust, allowing multiple classes, configurable snippets, etc?

Been thinking of expanding on the idea, but I don't really want to do it unless others might find it useful too.