The Riverhead Charter School reopened for classes Monday, almost a week after the Calverton school suffered heavy damage in a fire.
Two classrooms in the school's K-3 portable building were damaged, and other rooms suffered smoke and water damage. The cause of the Feb. 23 fire remains under investigation.
School officials originally wanted to move their entire K-6 school to a new building.
But, to get back in operation more quickly, the school moved its third grade to the undamaged North Building, while its K-2 students were shifted fewer than three miles to the east. They will be going to school at the North Shore Christian Church at 120 Kroemer Ave. in Riverhead, just east of the Tanger Outlet Mall.
The Riverhead Charter School called the move a "temporary arrangement," and said in a statement that it would continue until a lease on an alternate location for the entire school can be signed.
There are about 325 children at the school, who come from 16 different school districts.
"We are so appreciative that the North Shore Christian Church is able to accommodate our students on such short notice," said principal Dorothy Porteus in her prepared statement. "We look forward to a more permanent solution in the next few days."