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As Net-generation teachers reach out to gamers, classrooms across the country are becoming portals to elaborate virtual worlds.

But lately, researchers and educators say sentiment toward gaming is changing. Advocates argue that games teach vital skills overlooked in the age of high-stakes tests, such as teamwork, decision-making and digital literacy. And they admire the way good games challenge players just enough to keep them engaged and pushing to reach the next level

if ( show_doubleclick_ad && ( adTemplate & INLINE_ARTICLE_AD ) == INLINE_ARTICLE_AD && inlineAdGraf ) { placeAd('ARTICLE',commercialNode,20,'inline=y;!category=microsoft;',true) ; } The Pew Research Center reported in September that 97 percent of youths aged 12 to 17 play video games, and half said they played "yesterday."

Phones and computers contain dangerous metals like lead, cadmium and mercury, which can contaminate the air and water when those products are dumped. It's called electronic waste, or e-waste, and the world produces a lot of it: 20 to 50 million tons a year, according to the UN — enough to load a train that would stretch around the world. The U.S. is by far the world's top producer of e-waste, but much of it ends up elsewhere — specifically, in developing nations like China, India and Nigeria, to which rich countries have been shipping garbage for years.