University of Pennsylvania
For that, I advise you a free course from the University of Pennsylvania designed for international students.
Here you will find all information about U.S. application and admission process and will get some useful tips.
Technovation Challenege 2017 - Regional winner
Junior Achievement Georgia 2015 - First place
Gold Medal for academic achievements
National Physics Olympiad Finalist 2016
National Math Olympiad Finalist 2012 - 2016
National English Language Finalist 2015-2016