This story has only one probable solution. The Red Plan is already running far over budget so Congdon Elementary will not be rejiggered with four classrooms per grade. The only cost effective solution to a school designed to be too small for its current population will be an eventual shrinking of its boundary lines sending some of its first graders to other schools.
BTW: The story said Congdon was the last project of the Red Plan and failed to mention that Grant School is also awaiting its facelift. Then again, Grant parents are less likely to let their wheel squeak than Congdon parents.