Union at Darwen Vale High School sets strike deadline
A union leader says a new headteacher at Darwen Vale High School, where staff held a strike, has until the end of the month to rectify problems there.
Interim head John Lawson was appointed when headteacher Hilary Torpey was suspended after teachers went on strike over pupils' behaviour.
Avis Gilmore of the National Union of Teachers said staff will strike again if there is no improvement.
Unions and management have agreed a series of action points.
"If these are implemented they will make a huge difference in the school and will resolve the dispute," said Ms Gilmore.
"What our members have said is that they are giving him until half term to implement the action we have agreed, if nothing has changed by then they will consider taking further action," she added.
"The things that we've agree with the local authority and the chair of governors can be put into action quite quickly.
"Pupils and parents have been told that if a mobile phone is switched on during school time it will be confiscated and returned at the end of the day, something like that is fairly simple isn't it?"
Members of teaching unions had claimed management were not supporting staff in dealing with pupils' bad behaviour.
Unions have claimed pupils have physically and verbally abused staff, filmed lessons on mobile phones and threatened to post them online.
Blackburn with Darwen Council, which runs the school, is yet to comment.