Cass Tech is my Alma Mater: 1974 Grad.
Back then our school building had 8 floors and elevators. The old building was torn down about 8 years ago, I believe. Good teachers. Good times. Our colors were green and white. A smaller version does remain open and functioning.
Old Cass was a real Detroit monument. The building trade people erected a house each year complete with electrical and plumbing in a vast theater like work space. There was some push to retain and repurpose the old building when classes transferred to the new building. Cass was a really good school, I can only shudder at what I imagine both instruction and student work habits have become at this school.