I just published this all around “What’s New” document hitting the various areas with some basic screen shots and a short description. What is probably more valuable is the Wiki Articles index at the end of the document. It outlines based on area the different articles that were posted for 8.5.1 education. The 18 articles/tutorials are designed to walk you through a particular feature – most are in tutorial format with a step by step process and should be able to be completed under 20 minutes.
There will be many more articles coming as we already have several in the pipeline. If you want documentation or a tutorial on a specific area let me know or post it on the Wiki as a suggestion.