You can Insert Files into OneNote allowing students to view or access them. This can be for worksheets, reading material etc.
To Insert a file go to the Insert tab (1) and Select either the File Attachment (2) or File Printout tab (3).
You can still turn an attachment into a Printout after attaching it.
After Selecting your File it may come up with this menu.
These are the same two options from before.
To Insert a Printout from an Attachment, Right click the Document (1) and Select the Insert as Printout (1)
The Printout will behave similar to an image in the sense that it cannot be edited, however it can still be moved around/warped, and drawn on.