2+ players. The Music Teachers’ Association of California has made an outstanding effort to bring improvisation into school curricula. We haven’t purchased them yet ($32 each), but we are very curious about their Improvisation Syllabus and Guide and Improvisation Games and Activities.
One of their ideas is to illustrate local or state history musically. The procedure is to pick a historically or geographically important topic and then decide on possible musical resources needed to invent a piece about it.