Every time Caleb Hefren's ping pong paddle collides with the tiny white ball, he knows he's doing something that will change the world.
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The year eight student was one of the driving forces in organising the ping pong challenge at the Wagga Christian College.
For 12 consecutive hours on Thursday, students in years five to eight will play continuous games of ping pong to raise funds to end global slavery.
"I got here at seven in the morning and I'll be here until seven at night," said the 14-year-old.
"It's worth it though, to help people around the world."
The school has now raised over $2000 for charities involved in the rehabilitation of former slaves in South East Asia.
Having raised $315 on his own over the past month, Caleb was among the highest fundraisers at the school.
Only 13-year-old Henry Moffitt managed to eclipse his efforts by raising $450 by himself.
Caleb's enthusiasm for the project began during his geography course, when he was researching levels of inequality around the world.
"We looked into the history of shipping containers, and how that's helped in exporting cheaper food around the world," Caleb said.
"But then in places like the cocoa industry, there's so much inequality where they're actually forcing little kids into doing this work for them."
The research project has caused the students to think differently about the materials and products they use in their every day lives.
"The chocolate industry is more aware of the problem now, and it's making sure its [products] are coming from places without slavery," Caleb said.
Schools and community groups all over Australia and America will take part in the ping pong challenge this week.
Wagga teacher Kyle Moffitt said the school's involvement was evidence the students were delving deeply into their coursework and finding the practical applications beyond the classroom doors.
"We mainly looked at the issue of child slaves, and the places were they exist," Mr Moffitt said.
"It's amazing to see almost every product you hold has had slavery involved in its production somewhere."