Parents and pupils at Llanrumney High School will gather outside the Senedd later to protest against its planned closure.
Yesterday, the Welsh Government's consultation which sought views on whether the school in Cardiff should close this August ended.
The school was put into special measures by the school inspectorate Estyn last year. A previous proposal was to close the school in August 2014 but the Welsh Government is looking to bring that forward to this summer.
The suggestion is that all pupils attend Rumney High School instead, or another school that parents prefer.
The move has been met by opposition with more than 550 people signing a petition against the plans. Campaigners say the move "will effect the pupils education and their confidence."
For more education stories from across Wales click here.
More top news
Temperatures will tumble under clear skies tonight with a widespread frost developing.
Police found more than 20 cannabis plants, a small amount of cocaine and a prohibited stun-gun at the home of Richard Williams.
Finance Secretary Mark Drakeford and his Scottish and Northern Irish counterparts demand no further public spending cuts in the UK Budget.