Hi @CaroleFrancis! If you're wondering how students can use the Collaborations group they created, they can simply click the name of the collaboration and a new tab will appear, prompting them to log in to google docs. Once they log in, they can immediately start editing the document. This article explains it very thoroughly:How do I view Collaborations as a student?
To save the resulting document in Canvas as a Word file, students can share, or download and save it as a .docx file using Google Docs, then re-upload it by submitting it to the appropriate assignment or quiz. This video at around the 3:40 timestamp shows how to do this using the Microsoft Office option in Collaborations, and the same steps apply when using Google Docs. They can also upload the downloaded file to a specific group by going to the files page and uploading it. This article helped me figure it out: How do I upload a file to a group?
Please note that instructors have access to all collaboration groups and can open the associated Google Docs links.
I hope this helps!
-Thea