In 1937, a new building on Emerson Avenue opened its doors and became the home of Highland Park High School—where the high school has remained to this day. It cost taxpayers approximately $400,000 at the time. At around the same time, the education system added a twelfth grade, so the new Highland Park High School served students in grades ten through twelve. The old high school building on Normandy Avenue became a junior high school for students in grades seven through nine. The new building featured 32 classrooms, 2 gyms, 2 auditoriums, a library, a cafeteria, an armory, a clinic, offices, a public address system, tennis courts, a greenhouse, and a football field with permanent seats. In 1951, a new administration building near the high school campus opened. Today, Highland Park High School features three large plaques just inside the main entrance on Emerson Avenue which list the names of all HPHS alumni who went on to serve in the U.S. Armed Forces.