It's a scene out of a Dickens novel - coal being shovelled straight into a coal boiler to heat up uninsulated and cold classrooms.
But for many teachers and children across New Zealand, it's daily life.
Around 200 schools still use a coal boiler, but the government is hoping to put an end to it.
Ten more schools are being subsidised to get a replacement heating source, but National is questioning whether it will actually reduce any emissions.
Harry Lock reports.