Students act as mentors and tutor youth, provide nutrition education for families, cultivate community gardens and teach culinary job training classes for unemployed adults.

WHITEHOUSE: Service as a Life and Legacy

Slader, along with Coursera, Tutor, Flatworld Knowledge, is one of several education start-ups experimenting on the for-profit side.

FORBES: An Apple for the iPad? Technology & Education Start-Ups

He was supremely happy at Oxford, where his tutor was Isaiah Berlin, to whom he said he owed all his higher education.

ECONOMIST: Wynne Godley, British economist, died on May 13th, aged 83