Instead,they say it should be used as a way to get students to express ideas.

VOA: special.2009.10.29

But Professor Gaechter says his team's theory was that punishment has only low costs because it needs to be used rarely and works as a threat.

VOA: special.2009.03.03

to fight terrorism He said it is time to move on, adding the nation will not be safe as long as national security is used as a wedge to divide America.

VOA: standard.2009.05.21