There are a few good online resources to start the process for finding out more information about schools in the area.
Great Schools http://www.greatschools.org
is a great online resource to see what schools are in the area, and also to look at specific schools. There is information regarding demographics, test scores as well as other information. In addition,parents can go on and review the school, so you can get some insight from parents who have kids that are enrolled or who have graduated
Berkeley Parents Network http://parents.berkeley.edu/is
also another great resource. They cover much more than Berkeley and have information about schools across the East Bay. If you sign up for the list serve you can also ask questions to the parent community to see if there is more current information about the school.
You might also try contacting the school directly to see if there is a PTA organization that you can contact parents at the school to get their insight.
Hope this helps!