John, That's funny you mention the niche of BIAB in schools. As a private instructor, I have been exposing my progressive knowledge on using BIAB to my guitar & piano students. I use it as a technique for them to think outside of the box (pardon the pun) of their own instrumental world; especially guitarists. I know, from being one, I have a tendency to forget that there are other people playing too and would also like to solo as well! Hmm, what to do while they are soloing? The extra nice feature of this product over something like JAMMER is that it offers the notation of the songs as they are created.
Speaking of tutorials, the best thing I found for teaching the students (and future BIAB customers) is to take a familiar chord pattern and change different styles to it. This way, you have the same chords and then allow for the style to create its own mods and capture what changes took place in the chart.
I gotta think of something new for a couple of my students. They already have done recording sessions, writing their own 2 part guitar harmony songs and recording them. So, I am ecstatic for what BIAB brings to the music education front. I have not dove into the practice Jazz tunes for them yet. I am still trying to learn them. Hence, my naive jazz posts!
Sorry for another shameless plug for BIAB.
Thanks RickeG