Member for Mallee Andrew Broad, Member for Lowan Emma Kealy and Horsham Mayor Mark Radford explained to the class their different roles and responsibilities across the three tiers of government.

Students then had the chance to quiz the trio.

Student Angus McDonald asked Ms Kealy a question about the overbreeding of thoroughbreds in Australia's racing industry.

He said he was motivated to ask the question through his family's experience running Grampians Horse Riding Adventures.

"It gets to the point where we can go down to the Hamilton horse sales and buy an ex-racehorse, for $300 where a year ago it could have been worth millions," he said.

"Australia breeds more horses than a lot of countries combined - it's absolutely crazy."

Ms Kealy said she believed the racing industry needed regulation, but it formed a significant part of regional Victoria's economy.

Charlotte White asked Cr Radford why council had ordered promotional material for the Mother's Day Classic to be removed from certain places around the city.

"My step-mum has breast cancer and is currently undergoing treatment, and it got me interested because it's such a good cause," she said.

"I wanted to see the mayor's point of view on wheteher or not that's reasonable."

Cr Radford said council had rules about where promotional material could be displayed, which had to be followed.

Miss White said she enjoyed the chance to hear from her government representatives.

"It was really interesting seeing different points of view from different levels of government that come together to make a nation," she said.