Girton was nominated by his football coach, John Russell, and was unsure about going at first.
"It was questionable, because I had never heard of it, but then I realized it was an honor," Kodie's mom, Karen, said.
"I was kind of shocked when my coach told me he signed me up," Girton said.
Girton spent the weekend learning about leadership and working on skills for the classroom with students from all over.
A workshop on presentation skills is already coming in handy, as Kodie will be teaching his social studies class soon.
He said students were given four topics to choose from, and had to explain their choice in front of a group in 35-40 seconds.
NYLSC holds conferences in 38 states and the District of Columbia to provide students leadership skills during a "critical phase in their life," according to the website.
Students stay in a hotel for the weekend, and are supervised by adults around the clock.
Girton said he enjoyed staying in Indianapolis for the weekend, and had fun getting to know his roommate, who is from Michigan City, Ind.
"Anybody who gets nominated, I would recommend they go. It was one heck of an ordeal," Girton said.