Miami Senior High School was established in 1903 and was the first
high school in what is now
Miami-Dade County. Originally, high school classes took place in Miami's first schoolhouse, a two-story frame structure that was built in 1898 on what is now NE 1st Avenue, between 3rd and 4th Streets. This building, considered temporary, was a one-story frame
bungalow addition built directly behind the existing schoolhouse. It opened its doors on September 18, 1905, with 29 girls and 20 boys in attendance. In 1909, the school board decided to build a new schoolhouse to again house all grammar and high school students together. In 1911, a new three-story concrete schoolhouse opened its doors. The original one-story high school building was moved to SW 12th Street and 1st Avenue, repainted, and opened as the Southside Elementary School. After a
new Southside Elementary School was constructed in 1914, the original high school building fell into decades of neglect, operating as a boarding house for 90 years. It was "discovered" in 1983 by a local historian and, in January 2003, was moved to its current location in Southside Park, where it has since been renovated and opened as a community center. The building is listed on the
U.S. National Register of Historic Places. 1968 was a significant year for Miami Senior High School. Structural changes were made to accommodate a newly installed air conditioning system that closed off the building's high ceilings. The original windows on the building were sealed with bricks before the completion of the work, and students suffered in hot classrooms for a large portion of the year. This was also the year of the major
Florida statewide teachers' strike, which caused students’ classes to be in chaos due to having many newly hired substitute teachers, while their regular teachers walked
picket lines for weeks. ==Demographics==