Teachers have to keep up with much more than the content of their subjects in today's world. Technology is constantly changing the way we do things. Watch the YouTube video below to see one person's view of the challenges young people will face as they enter the job market. I'm not sure I agree with the part about computers eventually being smarter than humans, but the video does emphasize the point that students need to learn to think and not just memorize facts.
The person who posted the video gives credit to Karl Fisch and believes that he is a teacher in Colorado.