Devlin Retrospective

In his latest Devlin's Angle post, Keith Devlin looks back over 23 years of writing math columns (his "mathemaliterary journey" as he calls it) that divide into 3 main themes: 1) "What is multiplication?" ...the theme that created a "firestorm," 2) "Mathematical Thinking," and 3) MOOCs:

http://devlinsangle.blogspot.com/2014/01/23-and-me-play-it-again-sam.html

with enough links to fill your weekend reading time… (perhaps 2 weekends).