The ceramics teacher announced on opening day that he was dividing the class into two groups. All those on the left side of the studio, he said, would be graded solely on the quantity of work they produced, all those on the right side solely on the its quality. His procedure was simple: on the final day of class he would bring in his bathroom scale and weigh the work of the "quantity" group: fifty pounds of pots rated an "A", forty pounds a "B", and so on....