They say the fear is that many people will take part in what might be considered a feeding frenzy by purchasing a gun, but not learn how to properly use it.

CNN: STORY HIGHLIGHTS

And one of the things we're trying to do with the Recovery Act is to help schools get broadband, get computers, but then also train people to use it properly.

WHITEHOUSE: Town Hall in Arnold, Missouri

But the plastic-dispensing device was difficult to use properly.

FORBES: Magazine Article

But value-added is complex and difficult to implement properly, and even more difficult to use as a metric for getting rid of bad teachers.

FORBES: Getting Rid of Bad Teachers

But if the market will not properly value a company's ability to generate cash, it makes sense to use the money to buy things cheaply.

ECONOMIST: The paper industry