Video demonstrates the steps listed in google classroom
1. right click the stl file
2. click share
3. click "get shareable link"
4. switch over to google docs
5. hold down Control, press V to paste the link
6. this document is what you will submit in google classroom.
Your STL file must be in google drive. When you paste the address for the link it will start
"https://drive.google.com..."
If it starts off with "file" at the beginning, that tells you the file is stored on your local device. You'll need to move the file to drive. For a quick tutorial on how to do that... • Upload Files from Chromebook to Google Drive