Visual Thesaurus includes a free-access column Teachers at Work. Here's an excerpt from Michele Dunaway's piece about letter-writing.
I will always maintain that we do our students a disservice if we don't teach them how to communicate using the written word. Letters are not only a way to gain what we want, but they are also a way to spread cheer and kindness. Just because that letter may nowadays be more often found in the body of an email doesn't mean that letters have lost their luster. It simply means that if you send one snail mail, you really care enough to go the extra step.
To read more of the column, click the above hyperlinked text. To explore Teachers at Work, click here.