When Jack Berne when to school last week, he knew very little about the drought across NSW.

A week later, the 10-year-old has become the poster boy for a campaign to raise funds for farmers that is being supported by at least 66 schools and dozens of businesses.

Students at St John the Baptist Primary School are trying to raise $200,000 for NSW farmers. Credit:Janie Barrett

"At school we've been watching a video about the drought and I thought we needed to do more, so I came home and spoke to Mum," said Jack, who is in year 4 at St John the Baptist Primary School in Freshwater.

"I knew what a drought was before that, but it was devastating to see kids my age skipping school but not really getting anywhere.