by Trebor Scholz.

This week I gave a presentation to our teachers based upon the lyrics of Dylan’s song, The Times They Are a Changin’.

There is a mathematical principle at work when you use one of several URL shortening services. It’s called “hashing.”

This blog post goes into depth about the process.

These are nice when you have complicated, long addresses to share. But what worries me is… what happens if the service goes south, and you’re stuck with a meaningless placeholder?

This summer I’ve published a few movies through my efforts at work.

• Back to School Technology Presentation
• Promethean ActivClassroom Video
• Teacher Summer Training

TED TALKS: Ken Robinson

I wanted to embed the video here, but their embed code wasn’t quite working. Instead, spend 20 minutes and watch this presentation. It’s both humorous and thought-provoking.