A teenager creates a checklist to complete before she studies abroad and realizes that her toughest task is leaving behind her best friend. A teenager creates a checklist to complete before she studies abroad and realizes that her toughest task is leaving behind her best friend. A teenager creates a checklist to complete before she studies abroad and realizes that her toughest task is leaving behind her best friend. A teenager creates a checklist to complete before she studies abroad and realizes that her toughest task is leaving behind her best friend.