Use an ADJACENT PLATFORM (eg pinterest) to create a SHARING WALL of favourite historical photos with a rationale for your choice. Class discusses favourite photos and forms into groups using CROWD BONDING, then forming together for TEAM WORK (suggested pattern?). We provide outlines and tasks for the teams to work together. We'll FISH BOWL at the end.
See History of Photography MOOC at http://ilde.upf.edu/moocs/pg/lds/view/2235/