And some classrooms are equipped with things like a Smart Board, a kind of interactive whiteboard.

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The systems are getting more sophisticated, too: some are even smart enough to help you correct course if necessary.

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These are some pretty smart letters from some pretty smart young people.

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"I don't doubt some kids are super smart, can 'spot a perv' and avoid them with no difficulty, but... not everyone has that talent, " he said.

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