The 23-year-old, who won the Women's ITU Under-23 World Triathlon Championships in London last week, visited Glasgow School of Sport to give a talk to the aspiring athletes.
Charlotte said: "My message to them is to really enjoy their time here and make use of the opportunity because there aren't many people in the world who get this experience."
Charlotte, who is originally from Helensburgh, Argyll and Bute, competes for Australia after her family emigrated Down Under in 2005.
She trained at the Bellahouston school from 2002, attending at the same time as London 2012 silver medallist swimmer Michael Jamieson.
Charlotte, who lives in Bairnsdale, Victoria, is now focusing her sights on competing in the triathlon event at the Olympics in Rio de Janeiro, Brazil, in 2016.
She also hopes to make the Australian squad for the Glasgow 2014 Commonwealth Games.
She said: "Glasgow 2014 is in the back of my mind.
"It is possible, but I am trying to think more long term at the moment and heading towards Rio.
"If I got to Glasgow 2014, I am sure some of my family would be wishing I was racing for Scotland, but I have come back to race here before and I always get a lot of support from the Scottish people."
Charlotte said her time at the School of Sport had been the perfect grounding for her professional career.
Pupil Kirsten Forster, 12, from Mount Florida, said meeting Charlotte had given her hope of being a professional athlete.
She said: "It's not just you come here, then you leave and you don't do any more athletics, you can go off and do big competitions."
Norrie Hay, high performance coach for athletics at Glasgow School of Sport, said Charlotte's visit was a fantastic opportunity for the young pupils.
He said: "They watch the TV and they see Mo Farah and Jessica Ennis-Hill, but to actually get the chance to meet someone who was here and competes at the highest level, you can't buy that experience."
Applications for Glasgow School of Sport are now open and prospective pupils can visit the school at an open day on Saturday, November 16.
For more information, call 0141 582 0034.