Udutu can package a zipped HTML file into a SCORM file. Jennifer Foster explains how to publish a Twine branching scenario into a SCORM file that works in an LMS.
A lovely chat simulation built in Twine with the Trialogue story format where students can "chat" with characters about their lives in Iron Age and Roman era Scotland, England, and Wales. There's a teacher's guide as a supplement for classroom use.
This is something I've struggled with--a good method for storyboarding branching scenarios. I've used several different Word and PowerPoint templates in the past, none of which have quite worked the way I wanted. I can write the branching in a linear document without much trouble (I once drafted one longhand in a notebook), but it makes my SMEs brains explode to try to follow them. I've seen recommendations for Twine in the past, and this explains in more detail how it works as a storyboarding tool.