Jack DeStefano of Marlboro recently enrolled in the National Youth Leadership Forum on Medicine, which will take place in Philadelphia in June. He will join 350 other high school students from around the country who demonstrate academic excellence, leadership potential and an interest in a career in medicine. Throughout the 10-day forum, students will be introduced to a variety of concepts in public health, medical ethics, research and general practice, and will visit medical facilities and clinics, where they will go behind the scenes to view professionals at work.