If your teachers asks you to submit an assignment via GoogleDocs, here's what you'll do.

Step 1:   If you already have a Google account (gmail), then sign-in and jump to step 2.  Otherwise:

Step 2: Now that you have a Google account, you can open a GoogleDoc.

Step 3: Do your writing (show ALL development).   Example document name:  English 11 - 1.2 Descriptive Paragraph - Your Name

Step 4:  Share and submit your GoogleDoc.   General access = Anyone with the links, Editor