Teachers love personalizing their classrooms. And why wouldn’t they? As many annoying philosophers have noted, the modern school is pretty similar to a prison. And so, if you want kids to come to class every day without wanting to jump off the building’s roof, lightening the mood a bit by spicing up your classroom is one way to go.

It’s not always easy to do this, however. One teacher learned this after trying to hang a clock and, well, you can see what happened.

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