Miami-Dade Schools police officers responded to D.A. Dorsey Educational Center on Saturday morning in Miami's Gladeview neighborhood.
Miami-Dade County Public Schools' Miami-Dade Technical Colleges runs the center, now known as the D.A. Dorsey Technical College at 7100 NW 17 Ave.
Superintendent Alberto Carvalho went to the school, where a vandal reportedly damaged a computer room.
"An assault on this school is really an assault on the community," he said. "It's really unacceptable."
The robber made off with about $60,000 worth of equipment, which included tools and computers.
"We're educators, not just children, but adults and this is part of the adult community and it's really a menace to our education environment to have this happen," Chief Ian Moffett of Miami-Dade Public Schools said.
Local 10 News Marcine Joseph contributed to this report.