Human vocal cords can vibrate more than 150 times per second, potentially racking up a million vibrations in just over an hour of speaking and damaging the membranes involved. New research shows teachers spend nearly a fourth of their time

Download this PowerPoint fileThis 75-slide, illustrated presentation discusses how you can create your own media empire with podcasts and videoblogs.

Instant messaging. Blogs. Wikis. Social networking sites. Cell phones. All of these allow us to communicate with each other—wherever, whenever. Many people speculate that online and mobile technologies have widely impacted written language, especially that of teenagers and young adults.

Hear a student's fascinating presentation on experiencing culture shock when starting college in the United States. Today you can view Part 1. Part 2 will be available tomorrow.View the original here.

Hear the one about the job candidate who brushed her hair during an interview? Or the man who sniffed his armpits on the way into the interview room?View the original here.