Google Classroom: Turn in an Assignment (English)
You can attach files to your assignments in Google Classroom. You can create new files in Google Docs, Slides, Sheets, etc., work on the file, and then attach it to your assignment. Depending on the type of assignment, you will see Turn in or Mark as Done. If you need to edit work that you turned in, you can unsubmit the assignment before the due date, make changes, and resubmit.