PHILADELPHIA (AP) — A Philadelphia boarding school for underprivileged students is getting a royal visit.Britain's Prince Edward will plant a tree when he visits Girard College on Thursday. His great-great-grandfather — the future King Edward VII — did the same thing in 1860.The private school is not actually a college. It provides low-income students in first through 12th grades with free tuition, housing and meals. And it's facing big challenges.The school was founded in 1848 with a bequest from wealthy Philadelphia banker Stephen Girard. However, recent financial troubles have led to staff layoffs and fewer students being served.Also, Girard's young and dynamic president is stepping down in June.Girard officials say the 164-year-old school will rebound.___Online:http://www.girardcollege.edu___Follow Kathy Matheson at