Where are the best schools in the San Francisco/Bay Area?

The Bay area is huge so you would have to narrow down what part of the bay area. Also, for what age? As far as high schools go, most people I know went to private school in San Francisco because the California public school system isn't great -- especially in major cities that are overcrowded and underfunded. Waldorf, Uni, and Urban are all great private high schools but they're ridiculously expensive and very elitist. Lowell is a fantastic public school in San Fran, but your child has to test in.