"We've had to do a lot of volunteer work through the school," said Alyssa, noting that Westport requires 20 hours of community service to graduate.
"I think it's important if you have an opportunity to help someone else to take full advantage of that opportunity," Kelsey added.
While in Jamaica, the Carroll sisters will stay with a host family in a part of the island without modern conveniences like internet and widespread electricity.
"I think it will help us become more appreciative of what we have here," said Alyssa. "We're incredibly lucky growing up in an area like this."
Both girls said they are looking forward to learning about a different culture, and have been told about the welcoming spirit of Jamaica's people.
Despite stepping into an entirely new place, Alyssa and Kelsey have few reservations besides overcoming the mild language difference. Most Jamaicans speak english, but in a unique dialect known as Patois.
Their time there won't be entirely without play, however. The two will have their weekends off to travel to other parts of the island and spend time with their host families and fellow volunteers.
"It's an hour-and-a-half drive to the beach," said Alyssa, "but I'm sure we'll do that at least once while we're there."