The John D. O'Bryant School of Mathematics and Science (abbreviated as O'B), formerly known as Boston Technical High School is a college preparatory public exam school along with Boston Latin School and Boston Latin Academy. The O’Bryant specializes in science, technology, engineering and mathematics ("STEM") in the city of Boston, Massachusetts, and is named for one of Boston's prominent African-American educators John D. O'Bryant. The school is currently located on 55 Malcolm X Boulevard in the neighborhood of Roxbury, Massachusetts. With a student body of 1,500 7th–12th graders, this school is part of the Boston Public Schools. It currently shares a campus with the Madison Park Technical Vocational High School.