Fifty children and two adults were on board the school buses when the collision occurred in Stanley, County Durham, this morning.
One driver was trapped, according to the Great North Air Ambulance Service, which was called to the scene.
The doctor-led trauma team triaged the injured persons and a 12-year-old child was flown to the Royal Victoria Infirmary (in Newcastle) with serious facial injuries.
More top news
Chester has a proud political legacy. But now this once-safe Tory seat is one of the key 2015 battlegrounds
A Ukip candidate has been suspended two days before the election, as a video emerged apparently showing him threaten to shoot his Tory rival
A man has been charged with stealing his own barrister's mobile phone at a magistrates' court in Bexleyheath, Kent.