R.I.P. Clayton Christensen
Many are noting the recent passing of Harvard professor and prolific author, Clayton Christensen. His seminal work was the Innovator's Dilemma, his well- researched and insightful treatise on disruption. However, I believe his most important work was Disrupting Class, a look at how the educational system as a whole is going to be substantially disrupted (rather than just 'reformed') in the early 21st century.
It is one of the few books I've read or listened to multiple times. Rest in peace, professor. The footprints you leave behind are deep and wide.