In my 8 years of teaching, I worked at 6 different schools, three with art on a cart, and moved 3 art classrooms because of school closings or renovations. WOW! This is important to know because teachers leave really cool art projects before they transfer to knew schools, and this is one of them. So, I have no idea of the background of these mask examples, but I can assume they have to do with Art History (Native American Art or African Art.) If you can tell the inspiration of these masks, please let us know in the comments below!) I assume the teacher did this with 4th grade. Some vocabulary ideas for this lesson would be: symmetry, assemblage (foil, paper), printmaking/stamping, emotions