I graduated valedictorian of my class in the US.
That is indeed amazing news! good job! good job! what did you major in? 
It was in Marketing. I had the highest Grade Point Average in my graduating class.
that's very impressive! are you planning to work for a particular company? or perhaps are you looking to create one yourself? 
I am going for more education first. They called me the dux due to being the highest ranking student.
that's a weird name they've given you! but i always admire a person who strives for education! I also do this! everyday learn more! gain more knowledge so always continue to strive for more greatness 
I wouldn't of won it in Australia. There they base it on contribution towards the school gather than the grades.
oh really? what are you plans for the future
I plan to teach in the Pleasant Valley School District. It is located in Monroe County, Pennsylvania.
that is something to aspire for ! i wish you the best and i hope that all your dreams come true