Randy Wang has boldly gone where many have yet to tread: He’s using decidedly unsexy technology to help India’s poor children get a decent education. The nonprofit he cofounded, Digital Study Hall (DSH), films the best Indian teachers (usually from middle-class schools) as they conduct classes, burns the lessons onto DVDs, and then mails the DVDs to poor urban and rural schools. If the schools don’t have DVD players, DSH provides them, along with 19-inch TVs and lead-acid batte…

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