The path started in Bolton. Harrison, whose parents split up when he was 3, took a train on his own several times a week after school to the training site in Manchester, where it felt as if he completed the same drill every day: receiving a ball on the left wing, accelerating down the sideline and swinging a left-footed cross into the box.
At home, Debbie Harrison was quietly researching alternatives. She guessed his soccer talent could carry him to a choice private school and an elite education, something she had never had herself. She set her sights on the Berkshire School in Sheffield, Mass., where tuition for boarding students runs just over $50,000.
“She took what turned out to be one heck of a gamble,” said Dan McElroy, who taught Harrison physical education at Turton, a secondary school in Bolton. “People like Jack Harrison don’t often come out of towns like this.”
Jon Moodey, the soccer coach at Berkshire, vouched for…