Store everything in plastic bags, even in the crisper, says Jean Draeger, nutrition educator with the University of Wisconsin Extension in Waukesha County, Wis.

把所有的东西都放在塑料袋中，甚至放在保险储藏格中，威斯康星大学营养培训师Jean Draeger说。

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The new technology is coming from outfits like Advantage Learning Systems, a small but fast-growing software company in Wisconsin Rapids, Wis. that sells instructional aids and computerized quizzes to monitor their results.

FORBES: Instant feedback in the classroom