I was recently a beta tester of a new authoring tool called PeBL Pro. As part of getting to know this program, I built a chapter of my book in it.
This is a fantastic adaptive learning software that allows the learners to interact real-time with each other and the instructor as they engage with the content. It is particularly useful for building materials for a diverse audience since you can scaffold internally- by reading level, content expertise, language, or anything else that makes sense.
This is the software I used for the DxH project as well.
PeBL Pro allows anyone who creates training and educational content to build highly interactive, social learning experiences, tracked by xAPI.