Certainly we should be wary of the idea that data could substitute for the personal connection between a teacher and a student.

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When that doesn't work, he poses as a substitute teacher and sets off the fire alarm when trouble approaches.

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Though many favored her no-nonsense attitude and open door policy, Wasilla substitute teacher Anne Kilkenny compared the atmosphere surrounding Palin to a popularity contest.

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Kim Hauser, a substitute teacher in the Chicago area, did not know about the explosions until her students went home and she got a chance to look at her phone.

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