This report examines the preparation of California public high school graduates to do college-level work, based on high school coursework and state and national testing. A companion report examines the proficiency of adults enrolled in basic skills education programs operated by California's public schools and the state's community colleges. This is the first in a series on this accountability measure and is presented as part of the Commission's "Performance Accountability Framework" for California postsecondary education. The Commission examined information on four measures of college readiness: SAT and/or ACT test scores, A-G course completion, CST-Algebra I test scores, and college preparatory level math and science course completion. While large numbers of California public high school students are engaged in college preparatory coursework and test-taking, the data show higher rates of participation for Asian and White high school students than for Latino and African American students relative to their overall high school populations. Females also fare better than males in most of these measures. An appendix describes the methodology. (Contains 9 displays.)