My first period class and my last period class were each given collaborative assignments.
Group one was given a form. They were instructed that they would all have to agree on what it was to become. Next they needed to draft a blueprint in their sketch books. Finally they needed to share the creative work necessary to make their design a reality. Needless to say the group could NOT agree on what the form should become. So we divided into two groups - the boys and the girls.
Blue Print of "Robot Monster"
My last period class was tasked with designing and painting a mural. They could paint anything but, they all had to participate and agree on the subject, design, and workload.
Design for Mural
You should all be very impressed. I know that I was.