I thought of this one in history the other day. -Rin
Plato's Cave
The students slowly made their way into the classroom, some in small groups, one dashing in just as the bell rang ("I'm not late!"). With a great rustling of papers and unzipping of backpacks, they all pulled out their notebooks and pens, ready to learn (or at least pretend to, in some cases).
Eventually they realized their teacher wasn't present. The classroom buzzes with hushed voices as everyone turned to ask their friends (who were, of course, so much more knowledgable than them) what they thought about it.
Silence fell as the teacher, Fuji Shusuke, walked in. He sat down on a stool in the front of the room. Fuji-sensei said nothing, just looked at the class in such a way that he was looking over all of them, and yet each student felt as though he or she was being individually stared at.
They stayed that way for some time, completely silent. Fuji-sensei never moved, aside from blinking. The students wondered what was happening, but no one wanted to say anything, lest they incur the wrath of the history teacher.
Eventually someone in the back raised a hand and spoke quietly.
"Fuji-sensei, why are we sitting here quietly?"
"Twenty two minutes." The class exchanged glances at this strange reply.
"We sat here for twenty two minutes before someone had the nerve to ask a question." Fuji-sensei clarified. "None of you would survive in Plato's Academy. The students and teacher sat in silence until someone asked a question. Only then did the teaching begin. Which brings us to today's lesson: Plato's 'Allegory of the Cave'."
When they were about to leave the class, Fuji-sensei stopped them.
"Don't tell the other classes about this." He smiled. "It's a surprise."
And he walked out of the room.