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 that specializes in mathematics, science, technology and engineering in the city of Boston, Massachusetts. 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. The school was named a 2010 Blue Ribbon School of Excellence, the US Department of Education's highest award.