A Google a Day provides daily trivia, and can be a fun way to teach your students important online research skills.
Get a Google a Day classroom challenges, lesson plans and more at http://google.com/insidesearch/searcheducation/
I am a Google Apps Certified Trainer that hosts a weekly podcast. The podcast is designed for to keep educators up to date with any new features or news that would be helpful to them. I also include a what's current section to highlight a not-new feature and an app exploration section.