One of the ads — for consumer electronics megastore Best Buy — showed a young woman joyfully surfing down a mountain of computers, printers, cameras and cell phones. I asked the kids how they thought the woman felt. Happy, having fun, excited, and free, they responded. Tell us about shopping at Best Buy? Bingo A flash of critical thinking. In the classroom. This was the teachable moment. Electronic waste in China. What do they want me to believe? Do I believe it? What persuasion techniques are being used?