Published Sunday, 02 February 2014
Graffiti also appeared close to the school grounds. (© UTV)
Catherine Seeley is a representative for the party on Craigavon Borough Council and teaches at the Belfast Boys' Model School.
However, Sinn Féin has said the 25-year-old has been unable to return to the job after she suffered sectarian intimidation.
The intimidation occurred after a message, posted on the Facebook page of the Protestant Coalition, called for parents to protest to have her removed from her teaching post because of her links with Sinn Féin and because of her alleged involvement in "marches, memorials and demonstrations".
Sinn Féin Education Spokesman Chris Hazzard said the woman had not returned to her job because of what he described as "sectarian targeting".
He said: "No teacher, whatever their beliefs or religion, should be singled out and targeted in such a way.
"It is now high time for unionist political leaders to face down these rejectionist elements and come out to strongly defend the right of people to live and work free from sectarian harassment."
Responding on Facebook, the Protestant Coalition said it had informed "the Protestant, unionist, loyalist community" of the woman's background, which was already in the public domain.
© UTV News