What should we think of someone who never admits error, never entertains doubt but adheres unflinchingly to the same ideas all his life, regardless of new evidence? Doubt and skepticism are signs of rationality. When we are too certain of our opinions, we run the risk of ignoring any evidence that conflicts with our views. It is doubt that shows we are still thinking, still willing to reexamine hardened beliefs when confronted with new facts and new evidence.

An attack on public education is an attack on democracy.

If charter schools are not more successful on average than the public schools they replace, what is accomplished by demolishing public education? What is the rationale for authorizing for-profit charters or charter management organizations with high-paid executives, since their profits and high salaries are paid by taxpayers' dollars?

I support charters, but the right kind of charters. I support charters that support kids who have the highest needs. A charter should be targeting students who are in serious trouble. It should serve students who didn't succeed in public schools when it can help them. Or, at least, charters should agree to accept similar proportions of the kids with the highest needs.

Can teachers successfully educate children to think for themselves if teachers are not treated as professionals who think for themselves?

American education has been littered with failed fads and foolish ideas for the past century.

Congress and state legislatures should not tell teachers how to teach, any more than they should tell surgeons how to perform operations.