Fablement allows you to write interactive stories in your browser

Source: fablement

You may already be using Twine, Inklewriter, Netstory, or Squiffy to write interactive fiction, and here’s another option.

Fablement is not only a platform for creating interactive fiction, but it is also a source for stories written by others. Signing up can be done with a Google, Facebook, or Apple sign in, or a username and password.

There may be inappropriate stories on there, so be sure to vet any stories you want to share with your students.