This would be the holy grail of Moodle integration. I do this on paper with ease, but with a lot of wasted paper and time. Have tinkered with this some It's been possible to co-author a Google Doc for a some time now. Controlled on the Google end.
Seven Ways to Make Office Hours Better for Students
All you need is a valid school email address. Please enter your school email address for example, john contoso. The email address you entered is not valid—please try again. The ultimate digital notebook, OneNote helps you organize class materials and easily collaborate with students and colleagues.