As I have written, I have two classes of students finishing up the writing of an Interactive Fiction project right now, using the software Twine to build and publish stories with multiple arcs. Before they started writing, I had them conceptualize their story ideas in the form of a story map. Here are two of them (we modeled this strategy earlier by having them map out one of the Choose Your Own Adventure novels they were reading.)
Peace (in the branches)
Kevin
Just donated a box of these choose your own adventure books to our school book swap. Love this idea of yours, to engage your writers in writing their own versions of these stories. Will they publish?
I am working on the publishing aspect now (well, over break)
Kevin