California Code, Education Code - EDC § 51745.6

(a)(1) The ratio of average daily attendance for independent study pupils 18 years of age or less to school district full-time equivalent certificated employees responsible for independent study, calculated as specified by the department, shall not exceed the equivalent ratio of average daily attendance to full-time equivalent certificated employees providing instruction in other educational programs operated by the school district, unless a new higher or lower average daily attendance ratio for all other educational programs offered is negotiated in a collective bargaining agreement or a memorandum of understanding is entered into that indicates an existing collective bargaining agreement contains an alternative average daily attendance ratio.

(2) The ratio of average daily attendance for independent study pupils 18 years of age or less to county office of education full-time equivalent certificated employees responsible for independent study, to be calculated in a manner prescribed by the department, shall not exceed the equivalent prior year ratio of average daily attendance to full-time equivalent certificated employees for all other educational programs operated by the high school or unified school district with the largest average daily attendance of pupils in that county or the collectively bargained alternative ratio used by that high school or unified school district in the prior year, unless a new higher or lower average daily attendance ratio for all other educational programs offered is negotiated in a collective bargaining agreement or a memorandum of understanding is entered into that indicates an existing collective bargaining agreement contains an alternative average daily attendance ratio.  The computation of the ratios shall be performed annually by the reporting agency at the time of, and in connection with, the second principal apportionment report to the Superintendent.

(1) The average daily attendance generated by special education pupils enrolled in special day classes on a full-time basis, or the teachers of those classes.

(2) The average daily attendance or teachers in necessary small schools that are eligible to receive funding pursuant to Article 4 (commencing with Section 42280) of Chapter 7 of Part 24 of Division 3.