Cal. Educ. Code § 44258.2

The holder of a single subject teaching credential or a standard secondary teaching credential may, with his or her consent, be assigned by action of the governing board to teach classes in grades 5 to 8, inclusive, in a middle school, if he or she has a minimum of 12 semester units, or six upper division or graduate units, of coursework at an accredited institution in the subject to which he or she is assigned.