Portfolio: A receptacle or case for keeping loose sheets of paper, prints, drawings, maps, music, or the like; usually in the form of a large book-cover, and sometimes having sheets of paper fixed in it, between which specimens are placed.
Oxford English Dictionary
"The Doctor forward stepp'd to shew
The wealth of his port-folio."
William Combe The tour of Doctor Syntax in search of the picturesque, 1812
There are several Course Portfolio collections you can browse. They are pretty diverse, in subject area, intent, and what they contain. For example, see: