During the protest, activists demanded "fair funding" for Philadelphia's public schools and slammed Corbett for issuing what they called "devastating cuts" to education since he took office.
By about 4:30 p.m., activists were spilling out into Broad Street and interrupting traffic. The protesters broke into chants such as "Hey hey, ho ho, Governor Corbett's got to go" and blew on whistles and noisemakers. Then they marched down Sansom and headed to the Comcast Center, after hearing Corbett might be there instead.
Chris Pack, Corbett's campaign communications director, said the fundraiser was always planned for the Comcast Center. In an emailed statement, Pack also said it was unfortunate that the teachers union would "perpetuate lies" about the governor's commitment to education, adding that Corbett has added $1.2 billion for schools since taking office.
Outside the building, Chanel Smith, a sophomore at Edison High School on Luzerne Street near 2nd, read from a statement calling the cuts unacceptable, and said Corbett does not care about students.
"How many lives have to be cut short?" she asked. "How many future lives have to be destroyed until they see the evil behind their plan?"
Delilah Baines Washington, 31, of South Philadelphia, who teaches English as a second language, said she was attending the protest to show support for her students. She also has a son, Salim, 6, who's a kindergartner in the district.
"Not only am I here supporting and fighting for my students, but I'm also fighting for my child, as well," she said.
Officer Tanya Little, a Philadelphia police spokeswoman, said six protesters were cited for obstructing the highway.
On Twitter: @dylan_segelbaum