Teachers unions are mad at me. The New York State United Teachers demands I apologize for my "gutter level" journalism, "an irresponsible assault on public school students and teachers." This is because I hosted an ABC News TV special titled "Stupid in America," which pointed out: -- American fourth graders do well on international tests, but by high school, Americans have fallen behind kids in most other countries. -- The constant refrain that "public schools need more money" is nonsense. Many countries that spend significantly less on education do better than we do. School spending in America (adjusted for inflation)...