As an Oaklander (god help me) - and married to a high school english teacher who doesn't happen to teach in Oakland - I checked with him and his alma mater website San Francisco State University. They have something called a DESIGNATED VOCATIONAL EDUCATION CREDENTIAL.
Before I point you to the link, there is the concept here of CLEARING your credential which must be done every 5 years. Effectively, you need to take X number of continuing education credits within that 5 year period to ensure that you are a teacher with the most current required teaching "techniques". Or something like that. I just double checked with him and there isn't a yearly renewal - definitely 5 year. Like I said - he is a high school teacher and that is a different credential than elementary and middle school.
And yes, there are some districts within California that allow teachers who have expired credentials - or working on emergency credentials which essentially is having passed the CBEST exam. I believe there is an expectation that they are of intent to complete their credential. Yes, they are in crappy areas that no one wants to work. Districts track their school performance with a metric of how many credentialed vs non credentialed teachers they have on staff, so someone teaching with an expired credential would be "known" - maybe not by name, but by number in the school "scores".
Additionally, my husband got his credential through an alternate credential program at San Francisco State where he taught on his emergency credential during the day and then went to school to complete the actual one at night. For a full year. Our first year of marriage. That was fun. Never saw the guy.
Finanlly, here is a link and the particular slice I'm thinking applies, (
http://www.sfsu.edu/~bulletin/current/programs/credpro.htm) but this is the slice I'm referring to:
REQUIREMENTS
Preliminary Full-time or Part-time Vocational Education Credential
Five years of work experience directly related to each subject to be named on the credential. Forty-eight semester units of postsecondary vocational training related to the subject may be substituted for a maximum of two of the five years of work experience (as specified in Leaflet CL-698A from the California Commission on Teacher Credentialing). At least one year of the required work experience must be within the three years immediately preceding the issuance of the Preliminary credential.
Possession of one of the following: a high school diploma; diploma based on passage of the GED Test; or foreign equivalent of a high school diploma.
Demonstration of knowledge of the principles of the Constitution of the United States. Applicants may satisfy the U.S. Constitution requirement either by course work or examination. The Teacher Preparation Center can provide a list of testing options that meet this requirement.
ISED 706 Principles and Methods of Adult and Vocational Education (3)
ITEC 711 Instructional Computing in Elementary and Middle Schools (3) or
ITEC 712 Instructional Computing in Secondary Schools (3)[/SIZE][/SIZE]
Good Luck!