To have your students artork mounted more smoothly without crinkles and wrinkles, you will need some Elmer's glue, a paintbursh, and some water. Mix 1 tablespoon of glue with 1/2 teaspoon of water. The mixture should still be thick, but not as thick as regular glue. Use a paintbruch to apply the glue to the back of student artwork. Press firmly with your hand or a heavy book to smooth it out.