If nothing else, the incident may serve as yet another example of why social studies—and history in particular—is such a tricky subject to teach, at least via textbooks and multiple-choice tests. Its topics are inherently subjective, impossible to distill into paragraphs jammed with facts and figures alone. As the historian and sociologist Jim Loewen recently told me, in history class students typically “have to memorize what we might call ‘twigs.’ We’re not teaching the forest—we’re not even teaching the trees,” said Loewen, best known for his 1995 book Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong. “We are teaching twig history.”