Each year, I try to implement some sort of group activity. I had a poster of paper folding techniques, most did not utilize it. So I started demonstrating at least how to roll one big sheet into a cylinder, and then use that to form the main parts of the shoe, that helped. I also mentioned that if they were making a high-heel, they should build up the heel so it would hold up in the fashion shoe. Also, they could make 2 shoes if they had time.
They had to figure the rest out for themselves. This was a great team-building activity!
I allowed them to work until the last ten minutes, when we had fashion show and I awarded the winning team with art trophies (mini pencils spray painted gold). The fashion show consisted of me playing Call Me Maybe into my bull horn (via my iPhone) while kids walked the runway (a couple of rugs) in front of the class to show off their shoe. I picked the winner based partly in design and partly on teamwork.