Glen Waverley Secondary College's "vision group" is one of many that will convene in Camberwell on Tuesday to campaign against child slavery.

Student Gabriel Wong, 16, co-founded the group after hearing about the concept on a visit to Emmaus College.

In turn, the Emmaus College students started their group after hearing about the idea from a different school.

"I agree with the concept 'think globally, act locally'," Gabriel said.

"There are a lot of things we can do as individuals that make real differences in the world."

Gabriel said vision groups were having a ripple effect in Melbourne's suburbs.

"It's like a cell. Hopefully we will be able to influence our community and the Monash municipality and get other schools involved."

Gabriel said child trafficking enslaved 27 million people on a global basis and there were practical ways to help, such as buying fair trade products.

The products guarantee no child labour is involved in the production process.

The GWSC vision group will attend World Vision's rally against child slavery at Camberwell Baptist Church, 460 Riversdale Rd, Camberwell Junction, Tuesday, 9am-5.30pm. Cost: $10. Details: vgroup.wordpress.com