For the past few years, laptop computers have been touted as a way of getting technology into the hands of all students, making "anytime, anywhere learning" possible. But laptops are expensive, their batteries die quickly, and they're not always easy to lug around. That's why some school technology experts are predicting that handheld computers, or personal digital assistants (PDAs), may be a more viable solution.

To be sure, PDAs come with their own set of problems: So...

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