It’s long seemed obvious that if we want to truly fix education, actually make it work for the 21st century, we need to kill a stockyard full of our sacred cows. And we had just the man for the job on The Bill Walton Show this week. Bryan Caplan, a professor of economics at George Mason University and author of “The Case Against Education: Why the Education System is Waste of Time and Money,” described the findings in his book and provided some stark recommendations based on them. First, he said, we need to understand what we’re doing in school. There is the romantic version, he said – you go, learn skills employers are interested in, then get jobs with those employers performing those skills. More likely is what he calls the “signaling school of education.” You mostly go to school to get certification, “a bunch of seals of approval saying, ‘Grade A worker’ or ‘Grade B worker.’” But, regardless of the grade, you need a seal.