Secondary schools in the London Borough of Southwark have agreed to keep disruptive children, unless they put another child's safety at risk.
The Council is thought to be the first local authority in the UK to have schools sign up to such an agreement.
The decision comes after a 2020 report by the council which found that the Borough had a higher than average exclusion rate. It also found academies would exclude more children than other schools.
A separate report, also from the council, found that black students in Southwark were 1.5 times more likely to be excluded than their white counterparts.
Teachers are being encouraged to try to understand the reason for bad behaviour by using a "trauma-informed" response and are being told not to take misbehaviour at "face value".
Councillors hope the borough will be the first in England to exclude no pupils in the coming years, according to the Local Democracy Reporting Service (LDRS).