Soul Music by Terry Pratchett
Susan did not know much about history. It always seemed a particularly dull subject. The same stupid things were done over and over again by tedious people. What was the point? One king was pretty much like another.
The class was learning about some revolt in which some peasants had wanted to stop being peasants and, since the nobles had won, had stopped being peasants really quickly. Had they bothered to learn to read and acquire some histoy books they'd have learned about the uncertain merits of things like scuthes and pitchforks when used in a battle against crossbows and broadswords.