OW long is a piece of string?
Long enough to tie 1500 students together in a fight to stop bullying at their school.
Glenwood High School's prefects and wellbeing team launched the String Movement last week at an informal school assembly.
There were no violins or cellos, but there was a video which encouraged students to protect each other against bullies.
The school prefects then told their fellow students how important it was to care for each other.
Sahiba Kaur challenged them to think about how they would feel to know some of their peers would have no pleasant memories of high school.
"If your friend is being bullied, will you just stand there and let it happen?" she said. "Or will you stand up and say 'no'?
Yesheel Naicker said it was important to stop the chain reaction of bullies.
"Sometimes, all it takes is supporting a friend in need, speaking up if you see bullying happening by reporting it, or even just being friendly to others."
The assembly was followed by a String Movement stall in the playground at lunchtime where students signed an anti-bullying pledge and received a piece of string to tie around their wrist.
"Once you sign the pledge you're making a promise to do your bit to act against bullying," Sandra Muleya said.
"Once you tie that string around your wrist, you're reminding yourself and others that you're helping to tie up the loose ends."