Expert John Bayley visits a school in north London where poor behaviour in the corridors is affecting learning in the classroom.
At Salisbury school, students often take up to 15 minutes to get from one class to another, so that lessons frequently start late.
John Bayley is called in to help and a new corridor policy is introduced for the whole school. A special assembly is held and good time keeping is encouraged with new clocks in every corridor.
Teachers are instructed to stand at their doors to welcome students to class and to a keep a record of those who arrive late.
But getting both students and teachers to change their ways is not a simple task.
