Friday Links

1. Male affirmative action is being used at Canadian medical schools, now that some  entering classes of medical students are only 23% male.  

2.  Five places in the U.S. where land is free.

3. The "People of Wal-Mart." Kinda scary.

4. What do the best classrooms in the world look like? Surprisingly, a lot like American ones—circa 1959 or 1989.