Link a Google Doc (ensure link sharing is set to ANYONE WITH THE LINK CAN VIEW)
Paste text (maximum 4000 characters)
Click on the link icon under Class Description.
Write "Course Outline" or suitable text in the box.
Ensure your Google Doc is set to "ANYONE WITH THE LINK CAN VIEW" so parents are able to view it.
On the Google Doc, click on Share > Advanced > Change > Anyone with the link can view > Done
Copy that link.