Cal. Ed. Code § 44926
The governing board of any school district may employ any qualified person who possesses a temporary certificate to serve as a teacher-assistant in a program conducted in cooperation with a California teacher training institution. No person shall be so employed unless he is enrolled as a student in a cooperating California teacher training institution at the time the service is rendered. Service by a person under a teacher-assistant certificate shall not be included in computing the service required as a prerequisite to the attainment of, or eligibility to, classification as a permanent employee of a school district. The governing board may make such payments as it deems proper for the services rendered.
Any person employed under this section shall not be subject to the provisions of Chapter 1 (commencing with Section 22000) to Chapter 27 (commencing with Section 24600), inclusive, of Part 13 of Division 1 of Title 1.
Ca. Educ. Code § 44926