[VRWCmember]

Why should they be copying and editing DVDs in the classroom,

Sometimes a few lines from a scene of a tv show or movie can illustrate a concept in a humorous or memorable way that makes a lasting impression and brings home the point much better than any textbook explanation possibly could.

[Tax-chick]

Then recite the lines.

[torchthemummy]

The full article may have mentioned this but there is a (to the best of my memory) 30-second fair use provision for audio and video.