Based upon 1969-70 ESEA Title I entitlements, this report represents an analysis of cost factors of the 25 largest school districts in California in effectively implementing compensatory education programs in both reading and mathematics in four or more grade levels. Numerous statistical data are given. Some districts reported a month-for-month growth in reading and mathematics in four or more grade levels (Long Beach, Los Angeles, Sacramento, Santa Ana, and Stockton Unified School Districts and Modesto City Elementary School District), while other districts reported a month-for-month growth at three grade levels (Fresno, Oakland, and San Bernardino Unified School Districts and Compton City Elementary School Districts). Brief district profiles of these comprehensive programs are given for Long Beach, Los Angeles, Modesto, Sacramento, Santa Ana, Stockton, Compton, Fresno, Oakland, and San Bernardino. Also given is a District Profile of the successes and failures in each of the required components and the district advisory committees. (SB)