There is also Enki Education, very similar to Waldorf education in feel, but very different in that it incorporates multiculturalism, instead of working strictly from anthroposophy and it's view of the development of human evolution, which works better for some. Try
http://www.enkieducation.org, many people really enjoy this approach, though it's not yet available for all grades.
Of course, Donna is a wonderfu lady at Christopherus, you can't go wrong there!