Mediashift, a sub-publication of the Public Broadcasting System, has an article highlighting the Los Angeles Times mashup of California public school rankings.  Mediashift writes:

California Schools Guide from the Los Angeles Times is a comprehensive data-based guide to private, public and charter schools in California. The guide includes test scores, enrollment, student-teacher ratios, demographics, teacher experience and reader comments. Schools can be searched by county, city or name, and ranked by each indicator.

I've found this tool to be quite useful, although I still occasionally resort the raw database on the State site just for Bay Area information.  One of the interesting quotes from the article states,

Factoid: Of the 10 schools statewide with the highest API scores, eight are in the Bay Area and four of those are in Fremont.

I'll admit that came as a bit of a surprise to me too.