This report is the ACT annual report on the progress of U.S. high school graduates relative to college readiness. This year's report shows that 59% of students in the 2015 U.S. graduating class took the ACT® test, up from 57% last year and 49% in 2011. The increased number of test takers over the past several years enhances the breadth and depth of the data pool, providing a comprehensive picture of the current graduating class in the context of college readiness as well as offering a glimpse at the emerging educational pipeline. This report is designed to help educators understand and answer the following questions: (1) Are your students graduating from high school prepared for college and career?; (2) Are enough of your students taking core courses necessary to be prepared for success, and are those courses rigorous enough?; (3) What are the most popular majors/occupations, and what does the pipeline for each look like?; and (4) What other dimensions of college and career readiness, outside of academic readiness, should educators measure and track? The following key findings are discussed: (1) graduating class representation; (2) academic achievement; (3) opportunity for growth; (4) student aspirations; and (5) next steps for improving college and career readiness of students. [For the 2014 report, see ED558038.]