For Other in Expedition, a perfect Goal for teenagers 14-18 years old that can be completed within 3, 6, or 12 months is: To become an expert in Expedition techniques by completing a minimum of three expeditions and participating in a minimum of one overnight backpacking trip throughout natural areas within 12 months. I will attend an Expedition-focused class at least twice a week for an hour and will practice outdoors in natural areas at least once a week for an additional 2 hours per week.