Digital Start-up Knewton Focuses on Adaptive Learning

The low-hanging fruit seems to be test preparation and video tutorials, but the bigger prize over time will be augmenting or replacing printed textbooks and increasingly penetrating the global education market. One small startup with the ambition to take that prize is Knewton. Based in NYC, Knewton raised $2.5 million from high profile backers including Accel and Reid Hoffman...