What does every school need? Teachers, pupils, classrooms... and clean toilets.
Carmen and Keiza went behind closed doors to investigate
That's what the pupils of Deptford Green School in South East London, thought.
Their school council launched a "Love Your Toilet Week" to encourage to get all the pupils involved to clean up their act.
As an incentive they ran a competition between the boys and girls to see who would have the cleanest loos.
It was a close call but the girls won and were awarded with a non-uniform day. The winning toilets will be given a complete makeover by the company that employs the school cleaners.
School Reporters at the school in New Cross decided this was the perfect topic for a news report and the BBC went along to help them make a video news report.
Carmen and Keiza, aged 14, had already set up interviews with the help of Citizenship teacher Ben Hammond.
Keiza quizzed film-maker Chad about his school loo comedy
They wanted to question students about the state of the toilets before and after Love Your Toilet Week.
They lined up cleaning supervisor Pauline, one of the judges who inspected the toilets, and head teacher Peter Campling as interviewees.
They also wanted to speak to Chad, a student who had made a short comedy film about how pupils misused the school toilets.
The BBC production crew discussed the structure of the piece with the students.
They also discussed how pupils would record their pieces-to-camera and decided to film them in the school toilets with reporters sharing lines.
Keiza interviewed Cal, a member of the school council.
Supervisor Pauline helped decide who kept the cleanest toilets
"The toilets were in a mess," she told him. "Kids would block the sinks with toilet paper.
"There was wee on the floor and graffiti on the walls. The pupils in the school regularly complained to the council about the state they were in."
Cal took the BBC crew on a tour of the school loos to illustrate the improvement.
Citizenship teacher Ben Hammond said: "The School Reporters learnt a lot from the BBC team.
"They understand now what it takes to put a whole report together. It's a lot more work than they thought for a three-minute film.
"They developed their confidence and learnt a lot about how to write a script."
Carmen said: "At first, the idea of having to interview many people like an actual reporter, and putting forward my own ideas to people with higher power, made me nervous. But it was a fun, easy-going process.
Head teacher Peter Campling was a competition judge
"In the end, I was glad I got the chance to work with the BBC and be taught about reporting and asking necessary questions to specific people.
"It's opened my eyes to see the amount of work it takes to get pieces ready for the media.
"It was a brilliant day. I'm so grateful I was given this chance and I'd definitely do it again."