Contractors worked over the weekend to install two portable classrooms at Frederick Law Olmsted School 56, the home of the magnet school for the gifted and talented.
The grammar school at 716 W. Delavan Ave. had been overflowing into two other buildings for some time.
Neighbors watched as workers moved the portable structures onto the property and welded them into place.
"The new classrooms were as wide as the driveway, so we were there to watch them," said Nancy Frederick of St. James Place, whose daughter, Kathryn, attends the sixth grade.
"In fact, my daughter's classroom is being moved over the holidays," she said. "They packed up their room. They look like mobile homes. We just were there to watch the trailer trucks push them back."
Classes in the school were disrupted last May by a basement fire that left damage of $20,000 to the building and $4,000 to the contents. No one was injuried in the fire, which started in a wood workshop.
Tim R. Downing, vice president of Downing Construction of Rochester, said the Olmsted School addition is part of an $800,000 school-expansion contract covering this site and two others in Buffalo.
"School 56 will be ready for occupancy when the kids go back to school," he said. "The other two (Schools 69 and 70) will be ready, depending on the weather, within a week or so after they get back."