Students at an Auckland school are using YouTube to promote an international fund-raising campaign to raise money for Christchurch's earthquake recovery.

Glen Eden Intermediate School students released a clip today asking foreign schools to organise "All Red and Black Days" to raise funds for the New Zealand Red Cross 2011 earthquake appeal, spokeswoman for the school Ann-Louise Hyde said.

The students had already received pledges from schools in Australia, Poland, Austria, England and an Australian businessman had offered to donate $50,000, Ms Hyde said.

The clip can be viewed at PLEASE WATCH THIS

Meanwhile New Zealanders were being urged to wear the red and black colours of Canterbury tomorrow to show support for the people of Christchurch.

National Red and Black Day was organised by Hamilton-based NZ Transport Agency senior communications advisor Kara Fleming as a way for the country to show solidarity and support for Christchurch.

"So many of us have felt helpless watching the devastation in Christchurch from far away, and people really want to do something tangible and visible to show their love and support for their fellow Kiwis."