This article reports on a school's effort to open Advanced Placement (AP) to all by challenging its students to take the leap into AP courses. Samuel W. Wolfson High School, on the south side of Jacksonville, Florida, is one of 27 schools in five cities across the country that chose to participate in a College Board initiative called EXCELerator. The program aims to diversify the AP classroom, which often serves disproportionate numbers of teenagers from white, affluent, educated families. EXCELerator is one of many projects nationwide driven by the growing conviction that high schools must stop reserving their more rigorous offerings for college-bound students. In an increasingly competitive, global economy, educators argue, all students need the cognitive skills built by college-level coursework.