Academic Performance index for California Schools: http://www.cde.ca.gov/ta/ac/ap/
California Department of Education: http://www.cde.ca.gov/index.asp
California Department of Education Statistics: http://www.cde.ca.gov/ds/
But it really depends on the individual teacher in the classroom. Ratings can't narrow it down to the one teacher that is going to be at the front of your child's classroom.
Then go to http://nces.ed.gov/ to check the stats.