Astor Collegiate Academy opened in September 2002 as a program. In 2003, ACA was introduced as a high school within the Christopher Columbus Campus in the Northeast Bronx. The main focus was business and technology. However, as of September 2011, its focus had changed to science and technology. Students are required to take four years of math & science classes and two years of technology classes. The school continues to have strong links with Lehman College through the TRiO, DYCD, New York Edge and College Now programs.