I recently tweeted the key problems Grav Open Course Hub was created to solve for tech-savvy educators, and I thought I would share them here:
Here is a brief video demonstrating how Grav with Git Sync can be configured to use GitBook for collaboratively editing Markdown content.
Look of interest? For step-by-step instructions visit learn.hibbittsdesign.org/grav-with-gitsync-and-gitbook.