Four fire engines and around 25 firefighters tackled a school fire on Warwick Grove in Hackney.
A small part of a single-storey outbuilding was damaged by the fire. There were no injuries reported.
The Brigade was called at 1904 and the fore was under control at 1959. Fire crews from Stoke Newington, Homerton and Tottenham fire stations attended the scene.
The cause of the fire is believed to have been accidental and involved a bread oven.