The College Board set off a national controversy in the summer of 2014 when it put into effect a sharply revisionist, left-leaning curriculum framework for its AP U.S. History (APUSH) course.

Now high school is slipping away. Slowly but surely, the College Board, sponsor of the controversial 2014 and 2015 AP U.S. history (APUSH) frameworks, is becoming an unelected national school ...