Earlier this academic year, Roni Dean-Burren, a Houston mother, posted on Facebook in response to a passage in her ninth-grade son’s history book, which referred to slaves—not as slaves—but as “workers” and “immigrants.” The post went viral, influencing the publisher “to apologize, correct the caption and offer — free of charge — either stickers to cover it up or corrected copies of the book to schools that want to replace their old ones.” They did not issue a recall of the misleading, erroneous books.