There are 3 different Levels of cards.  The first level has matching prints. The second and third sets uses similar prints by the same artists, for comparisons.  

There Is one card that includes directions for a charades game.  There may have been  more directions, or suggestions for games or teaching uses. 

The back of each card includes credit line information, artist, title, materials, etc. 

There is one card, a Manet print, that is missing the other match. So there are 17 complete sets,

I am a retired middle school art teacher and used these in the classroom. But they are in good shape, although a bit dusty.