Could you teach computer class without a computer? For Owura Kwadwo Hottish, 33, an information and communications technology teacher in Ghana, it's his only option. At the middle school where he ...

Cliff Stoll, author of "The Cuckoo's Egg" and "Silicon Snake Oil," teaches physics and makes Klein bottles. He rarely visits Pit 91 because he lives in Oakland. As the new school year approaches, our ...