This report looks at the progress of the ACT®-tested 2018 U.S. high school graduating class relative to college and career readiness. The data in this report are based on more than 1.9 million graduates--55% of the students in the 2018 national graduating class--who took the ACT at some time from grade 10 to 12. The ACT was taken by the majority of 2018 graduates in 28 U.S. states. In 19 of those states, the ACT was taken by all or virtually all graduates, typically as part of a state-funded assessment program. This national report presents key findings on the performance of 2018 graduates, STEM, workforce/career readiness, behaviors that impact access and opportunity, and pipeline. ACT score data over the years have consistently shown that educational outcomes among U.S. high school graduates--in the form of academic readiness for college and career--are stagnant, and this year's results suggest they may even be going downhill. Policymakers and educators must take strong, swift actions to reverse this course. The goal should be for all young people to have access to a high-quality, holistic education that will get them on target for college and career readiness by the time they graduate from high school. This report provides recommendations to help meet this goal. [For the 2017 report, see ED581671.]