Early this May, the temperature in Phoenix reached 106 degrees Fahrenheit — the sort of dry, searing heat that locals don’t expect until deep summer. On May 8, when it had cooled to a comfortable 83, the students walking between classes at Mountain Sky Junior High School seemed relieved. Mountain Sky is at the north end of Phoenix, just off West Greenway Parkway, a road that draws a dividing line: On one side, there are dozens of modest single-family-housing complexes spreading into the distance, their roofs terra-cotta and stucco, their back yards appointed with turquoise pools. On the other, there is…
When a state divests from public education