The purpose of this study was to examine the proportion of students in the cohort class of 2000 who completed Arizona high school graduation requirements within 4 years. The cohort class of 2000 comprises students who entered 9th grade in fall of the 1996-1997 school year, and were expected to graduate from 12th grade by the end of the 1999-2000 school year. The report also provide information about the number and proportion of students who obtained a General Educational Development (GED) certificate, dropped out, or remained enrolled for a fifth year of high school. Rates are summarized at the state level, by gender and ethnicity, by county, and by district and school. The cohort class of 2000 had a membership of 57,585 students. Of these, 71% graduated in 4 years, and 6.9% enrolled in a fifth year of high school. A GED was received by 0.3%. More than 75% of the females received high school diplomas, and 67% of the males graduated. Males were more likely to enroll for a fifth year of high school (8.3%) than were females (5.5%). There was a wide gap in the graduation rates of different ethnic groups, with Hispanic and Native Americans graduating at low rates (nearly 59% and 56% respectively), while White and Asian rates were nearly 79% and 84 % respectively. An appendix contains a high school cross reference with data by school. (SLD)