"TED-Ed's mission is to capture and amplify the voices of great educators around the world. We do this by pairing extraordinary educators with talented animators to produce a new library of curiosity-igniting videos. You can nominate a teacher, nominate an animator or suggest a lesson here: http://education.ted.com."
Check out the TED-Ed YouTube channel to watch a video that explains what this is all about as well as how you can share your teaching skills with a global audience. While you're there, check out the videos that have been developed so far. There might be something you can use for your classes.