As a school teacher, I’ve learned a lot about education.  I’ve entered high school classrooms filled with pregnant teenagers and young men who occasionally sported red eyes due to having been sprayed with a police officer’s mace.  There, I dismissed students from class early to attend trial for crimes they allegedly committed, and I’ve been wowed by the same young people as they broke out spontaneously into rap songs about the parts of speech and a classmate’s seeming inability to...