"Long after degrees have been conferred and careers have been launched, many folks just can’t seem to quit school. For them, life provides an overstuffed cornucopia of educational opportunities that don’t necessarily require hefty loans and navigating different professorial strategies."
KF: The usual caveats apply with these TOP OF THE CHARTS lists - the iPad is a personal device and people use them very differently - preferences for apps are not necessarily ubiquitous.
Via John Evans