The 74 Million – Mark Keierleber 
Since the 1980s, schools in Singapore have taken an innovative approach to teaching elementary math — a curriculum that focuses on problem solving with pictures and diagrams. Before the switch, the country’s math students “weren’t even registering on the charts as far as international ratings go,” says Dan Brillon, director of Singapore Math Inc., a company that distributes Singaporean math textbooks in the United States. (more)