ACE Technical Charter High School, (commonly known as ACE TECH), is a public 4–year charter high school located in the Washington Park neighborhood on the south side of Chicago, Illinois, United States. It is operated by the Chicago Public Schools district. The name ACE stands for Architecture, Construction, and Engineering. The school opened in 2004. ACE Tech is housed in the former Mary Terrell Elementary School building, a Chicago public school which closed after the 2001–02 school year.