The Embedit service allows you to choose from any of your files, then change the appearance of the file through their customization window, shown below.
In this window, teachers can also write on the document, add call-outs and create settings for the functionality of the document. You can allow or disallow downloading and printing of the file and make some privacy selections.
Finally, you just copy some code and, voila! The document is now embedded into the site with better visibility and functionality than old snipping and attaching techniques.
I have embedded a quick sample below just to show how it works: