My son was at a small charter school for the first five years of elementary, and though we loved the school, he was frequently bored, which is disastrous for a bright kid. We were concerned with him fitting in to a small tight-knit class for fifth grade, but he was welcomed with open arms by the other students, and he has re-found his joy for learning. His writing has improved ten-fold, and he is constantly being encouraged to create and stretch. At the beginning of the year he still felt math was not challenging enough, but they have since split off a group of the kids to do more advanced work.
If you are looking for a traditional school with loads of homework, this is not the school for you. But, if you are looking for a school which encourages kids to create and think outside of the box, while instilling in them a joy for learning through a progressive integrated curriculum, then look no further.
If you've ever watched Sir Ken Robinson's TED Talks on education and come away admiring him, you should know he was instrumental in developing Blue School's curriculum and continues to sit on the board. The Blue Man Group energy, creativity and openness undergirds everything about this school, and Alison Gaines Pell is simply extraordinary.