Let's start with two truths about our era that are so inescapable as to have become clich s: We are surrounded by more readily available information than ever before. And a huge percentage of it is inaccurate. Some of the bad info is well-meaning but ignorant. Some of it is deliberately deceptive. All of it is pernicious. With the internet always at our fingertips, what's a teacher of history to do? Sam Wineburg has answers, beginning with...