Matt, from 37signals, quotes British author Antony Jay on the benefits of working with small groups:
“The basic unit is [a group] which varies from three to twelve or fifteen in number, and perhaps optimizes somewhere around ten; that this group is bound together by a common objective, and that the bond of trust and loyalty thus formed can become an extremely powerful uniting force…”
Working with a larger class size has made me wonder if this doesn’t also apply with teaching. When discussing something personal like one’s creativity, it seems the larger the group, the less comfort in sharing.
When not everyone shares, when people become reserved with their ideas, then the energy and momentum seems to dissipate.