Sara Stevenson, the librarian of O. Henry Middle School in Austin, Texas, is on a roll.

Two days ago, she had a letter printed in the New York Times refuting its editorial about the need for “carrots and sticks” in dealing with teachers and principals.

Today she has a letter in the Wall Street Journal, taking issue with computer scientist David Gelernter’s claim that children learn best online. Gelernter, by the way, was the chief computer scientist for the for-profit online charter corporation K12 (founded by Michael Milken, current CEO Ron Packard of Goldman Sachs and McKinsey, and former Secretary of Education Bill Bennett).

Sara Stevenson is a model activist for children and the education profession.

If every teacher, librarian, social worker and principal was equally active in telling the public what they do and why it matters and speaking out against bad ideas, we could turn the national education debate.