To understand students' college preparation experiences, in May 2021, the authors surveyed high school seniors who took the ACT® test between September 2020 and June 2021. These students reported their intentions to attend a postsecondary institution (i.e., a four-year public college or university, a four-year private college or university, a two-year college, or a career/technical or vocational/trade school) after graduating high school. The purpose of the survey was to learn about student participation in college preparation opportunities in high school and its relationship with their perception of preparedness and subsequent college application behaviors. This brief shares what was learned from 2,354 high school seniors' survey responses and provides insights into what educators and policymakers can do to better support college-bound students' preparation.