Yes, it is still open. Read the below and follow through with the link provided.
For the source and more detailed information concerning your request, click on the related links section (Wikipedia) indicated directly below this answer section.
Yes, Mackenzie High School was/is in Detroit. The building is still there, but the school has been closed since 2007.
Frank Cody High School was created in 1955.
The motto of Detroit Cristo Rey High School is 'The School That Works!'.
Detroit Cristo Rey High School was created in 2008.
Lassiter High School, Marietta, GA
Greenwich High School in Greenwich, CT
Detroit Lakes High School's motto is 'Make it a Great Day or Not, The Choice is Yours'.
Renaissance high school
Prattville High School.
Detroit Catholic Central High School's motto is 'Motto: Teach Me Goodness, Discipline, and Knowledge'.
Prattville High School, now #74
Mumford High School. It is a popular school in Detroit that has been attended by many of Detroit's artists including The Clark Sisters, the Winans, Commissioned, etc.