Now that the first decade of the 21st century has been completed, the authors contend that it's time to stop talking about the qualities of 21st century schools and actually start being 21st century schools. The challenge for most school leaders in schools is not in establishing a relevant mission, but in being too cautious and deliberate about change. Even as they identify the qualities they believe graduates need in order to lead fulfilling lives today and in the coming decades, there's a tendency to continue to do school as usual--tweaking things, rather than embracing serious and necessary innovation. How can a school make the cultural shift from a good but cautious school to an innovative school committed to excellence and relevance in a rapidly changing era? At Presbyterian Day School (Tennessee), an elementary school for boys, the authors have found some of the answers not by looking at other schools, but by looking at Google--one of the world's most innovative and successful companies. In particular, the school leadership at Presbyterian Day School (PDS) read Jeff Jarvis's book, "What Would Google Do?," and considered the nine Principles of Innovation developed by Marissa Mayer, Google's Vice President of Search Product and User Experience--and what these principles mean for independent schools. (Contains 1 note.)