Students - you can add a Google Drive document (or Google Slides) to a rubric assessment, a blog post, your portfolio, or your bookshelf.
Where to Click:
Click "Choose File" under Student Attachments.
Click the paper clip next to Choose a file or drag it here.
Click + Add Item in the corner, add the details, then click the Upload to Portfolio button.
Make sure you are in "My Bookshelf". Then, click the + button and click Resource.