Students ask other students "have you ever been OOO?" then there will be corresponding points depending on the students answer. The fastest student to reach an exact 7 point total is to be declared the "lucky winner". I gave 1 box of pocky for the lucky winner in my class but some schools are really strict with food prizes so if ever you want to give one, maybe a sticker or school supply will do (e.g eraser, cute clips).
I also ask my Japanese teacher counter part the third question to add some spice to their puberty stage humor :3
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