PITTSBURGH — Public school teachers, immigration advocates and social and racial justice groups took to the streets in May Day demonstrations across Pennsylvania on Monday.

Philadelphia’s public school teachers haven’t had a contract in four years and haven’t had a pay raise in five years.

About 1,000 teachers took personal days to protest at schools, stage a rally outside the district headquarters and march to City Hall. The district employs about 9,000 teachers.

A school district spokesman said schools were open and the district worked with principals to ensure there would be no disruptions in classrooms.

At Philadelphia International Airport, food service workers staged a protest demanding they be paid the city minimum.

More than 200 immigrants, immigration advocates and leaders of labor unions and social and racial justice groups gathered on the steps of the Pennsylvania Capitol in Harrisburg for a May Day demonstration.

Speakers at the rally Monday criticized Trump over his comments and policies on immigrants. They said immigrants help Americans prosper.