In the annals of judicial imperialism, we have arrived at a strange new chapter. A California court ruled this month that parents cannot "home school" their children without government certification. No teaching credential, no teaching. Parents "do not have a constitutional right to home school their children," wrote California appellate Justice Walter Croskey. The 166,000 families in the state that now choose to educate their children at home must be stunned. But at least one political lobby likes the ruling. "We're happy," the California Teachers Association's Lloyd Porter told the San Francisco Chronicle. He says the union believes all students...