At 15, Jeremy Vargas might seem too young for even the most mundane of summer jobs. But the rising sophomore at DeWitt Clinton High School, a public school in the Bronx neighborhood of New York, secured an on-campus internship that allows him to apply art skills he learned in classes to create everything from T-shirt designs to door wraps. He’s working 25 hours a week this summer, and will scale back to upwards of 12 hours when school’s back in session.