School rebuilds: Inside London classroom in disrepair
12 March 2013 Last updated at 08:20 GMT
Last May the government announced that 261 schools in England would receive money from a fund aimed at rebuilding the country's most dilapidated schools.
When Maggie Rafee and her pupils heard that their crumbling school with a leaky roof was among them, they were ecstatic.
But that joy turned to frustration when she discovered that a new school was not expected to be built until early 2018.
Last month, Labour condemned the government's school rebuild record, claiming it was condemning children to learning in dilapidated buildings.
However, a Department for Education spokeswoman said works to Alperton Community School were not delayed, and that the school had been contacted in July to inform them that planning work would start between July and September 2014.
Mrs Rafee gives the BBC's Reeta Chakrabarti a guided tour of Alperton.
First broadcast March 2013