As a teacher not knowing how to code, I know that at first it was intimidating to me to think about diving into this with my classes. Fortunately there was some wonderful support and a main Hour of Code site that help us get started, and they are going to provide the same this year - December 8-14, 2014.
Ali Partovi and Hadi Partovi of Hour Of Code promoted a week in December 2013 with the mission of :
But the best thing for teachers is, they made it accessible and self-directed, so teachers do not need to know coding to get their students involved. Students can just dive right in!
You can start your students using that link above. They provide several easy to follow games that require students to immediately start coding. They also have a section of coding practices for students to try once they have completed the first sessions. Beyond Coding
Get on Hour of Code's mailing list and learn about this coming school year's Hour of Code efforts and get your school involved! It doesn't take much effort, but your students will LOVE it!