Student graduation from high school with a regular high school diploma is an important indicator of school success and one of the most significant indicators of student college and career readiness. In addition, there are substantial economic benefits to high school completion. For example, according to the U.S. Department of Education's National Center for Education Statistics (NCES), the employment rate for young adults who had completed high school (67 percent) was higher than the employment rate for those who had not finished high school (51 percent) in 2015. This non-regulatory guidance provides States, Local education agency (LEAs), and schools with information about how to implement the graduation rate requirements in the ESEA. Section A of this guidance clarifies the four-year adjusted cohort graduation rate (ACGR) definition and other key terms. Section B discusses requirements for calculating the ACGR. Section C identifies common issues related to implementation and reporting of the ACGR.