As fourth-grade teacher Abel Varney introduced a lesson on negative and positive integers, all eyes in his Sabin Elementary classroom were upon him -- including the unblinking lens of a high-tech camera.
The camera recorded Varney's every move and utterance and captured the reactions of every child in the room -- images that will be examined by researchers in a national study trying to figure out what makes effective teaching.
Varney is one of 176 teachers from 17 Denver schools who signed up to have their lessons analyzed during a two-year project funded by a $878,000 grant from the Bill & Melinda Gates Foundation.
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