Many thanks to Mick McMurray at MMHS for the video instructions!
Objective

Objective

Display full-text of a single document or sheet within a page.
Instructions

Instructions

Open the doc or sheet in Google Drive.
File > Publish to the web
Copy the code for Embed in its entirety...
Open your CatapultK12 page and drag an Unrestricted HTML card from the Tool area to the page area...
Double-clikck the unrestricted HTML card.
Paste the copied Google code...
To appropriately size the dispaly of the embedded document, you may wish to add the following attributes (bold) to the code before the close of the iframe tag:   ...x89Txv" width="100%" height="850px"></iframe>
 
Save the card edit, save the page and publish to the web after previewing.
 
Final result with no extraneous menus or headers: