Work with a doc assigned to you

If your teacher assigned a document to you as part of an assignment, you can open it in Classroom, work on it, and then turn it in. When you turn in the assignment, your teacher sees the document labeled with your name. If you need to start over, you can remove the document from your submission, create a new copy, and resubmit when you’re done. Google Support page

Chromebook (below) iPad/iPhone (below)