This was a lesson given as part of my World Art classes. We used 9x12 black construction paper, Sobo Glue, glue spreaders, and paper tiles. I purchased the paper tiles at an education supply store— a real time saver for me, and a way to take the monotony out of the lesson. The Sobo Glue seemed to work better than Elmer's. The spreaders and a small plate of glue made it much easier to cover the entire surface of each tile, and not use too much glue at the same time.
Check out my companion blog/site for art lessons at: positivespaceart.blogspot.com