This is an equity study, focusing on the crowdedness and adequacy of California's public school facilities. Facilities data are from a 1988 state survey and include information about building space, age of facilities, air conditioning, and construction type. The research focuses on two equity principles: horizontal equity and facilities neutrality. First, as a measure of crowdedness, the study uses a computation of square footage of instructional building space per student. Second, a measurement of the general adequacy of the facilities is derived using principal components analysis. In summary, the author finds that the horizontal equity statistical measures demonstrate that assessed property valuation, instructional space, and adequacy of facilities are not equally distributed to each of the 4,891,143 students in the data set. The facility neutrality statistics indicate that there is a statistically significant positive, but low, relationship between a school district's property tax base and crowdedness, and the adequacy of its facilities. The foremost policy implication is the need for additional financial support of $13 to $17.4 billion. Three strategies are recommended: (1) increase local fundraising capability by lifting the two-thirds voter requirement for general obligation bonds; (2) devote sufficient state funds to school districts by channeling sufficient funds to school districts, and (3) increase federal support to the states, with particular emphasis on districts at the bottom half of the adequacy distribution. (Contains 45 references and the Appendix contains a School Facilities Inventory Building & Classroom Worksheet.) (GR)