I used double sided tape punched with my 1/4" punch to create my little domes of glossiness. They grabbed the embossing powder really well and heated up nicely though gave a more pebbled effect. The little punchies are more touchy to get positioned and more easily damaged in the process so not ideal for the class room. I also tied my twill with a string instead of using a double knot. It is easier for most people to manage that process and creates a card with less "lumps" to catch in the postal template. If the card catches in the template it requires more postage to send.
I am back to the drawing board to see what I can do to change up this design to suit my class.