[填空题] Sixteen-year-old Michael Viscardi of San Diego won first (36)________ in the Siemens Westinghouse Competition in Math, Science and Technology. He showed (37)________ to a nineteen-century math problem. Michael has been (38) ________by his mother, who has a doctorate in neuroscience (神经学). He also worked on his (39) ________with a professor at a university. The National Center for Education Statistics did its (40)________research on home-schooling in 2003. Researchers found that more than one million American students learned at home. That was more than two percent of the school-age (41) ________. Michael Viscardsi, for example, has been taught mostly at home, but with (42) ________math classes at a (43)_________university. The researchers asked parents why they home-schooled their children. Thirty-one percent said the most important reason was concern about the environment of the local schools. Thirty percent said it was to provide religious instruction. Sixte