This supplemental report explores the developmental needs of Colorado's recent high school graduates, examines the postsecondary success of students who need developmental education and explores equity gaps as they relate to developmental education. It builds upon the report titled "The Postsecondary Progress and Success of High School Graduates" released by the Colorado Department of Higher Education (CDHE) in February 2019. Findings in this first report show the following: (1) Among the class of 2017, 56.3 percent of high school graduates went on to enroll in a postsecondary institution. These rates have declined since data was first reported in 2009; (2) Of high school graduates who attend college, 24 percent enroll out of state. This is an increase of 4.5 percentage points since 2009; (3) Outcomes are improving for those who enroll in Colorado postsecondary institutions. Each class since 2009 has experienced a greater percentage of students completing within two, four and six years; (4) Equity gaps begin early in the postsecondary pipeline for Colorado students; only 38 percent of Native American or Alaska Native students, 43 percent of Hawaiian/Pacific Islander students, 46 percent of Hispanic students and 54 percent of African American or black students enroll in college compared to 81 percent of Asian students and 78 percent of white students; and (5) Far fewer students who qualify for free and reduced lunch (FRL) are enrolling in postsecondary education than those who do not qualify. The Colorado Commission on Higher Education's (CCHE) master plan reaffirms the statewide goal of reaching 66 percent educational attainment by 2025 and outlines four key strategic goals: increase credential completion, erase equity gaps, improve student success and invest in affordability and innovation. These goals are essential to reaching the state's workforce needs, since more than three-quarters of all jobs are expected to require a postsecondary credential by 2020. [For the companion report, "The Postsecondary Progress and Success of High School Graduates. 2019 Legislative Report," see ED597822.]