A fun writing site (although I can’t promise content appropriateness). Basic premise, you publish a short story (minimum character count 64, max 1,024). Then people add on prequels or sequels.
Once youâ€™ve written and shared your ficlet, any other user can pick up the narrative thread by adding a prequel or sequel. In this manner, you may know where the story begins, but youâ€™ll never guess where (or even if!) it ends.
You could set something similar up for your class (school, or district) without much effort. It’d give you far more flexibility and possible collaborators than using traditional paper “pass the story around” activities.