This one kills at the geology conferences! This a funny 11" X 17" poster to place on your door for students to see as they leave your classroom. Of course, they won't get it until after to teach them that gneiss is the name of a metamorphic rock. You might notice that the word "gneiss" has been filled in with banding texture, as is common with gneiss rocks. Anyway, just a bit of silly decor for your room.