Big Brothers Big Sisters is the oldest, largest and most effective youth mentoring organization in the United States. Our mission is to provide children facing adversity with strong and enduring, professionally supported 1-to-1 relationships that change their lives for the better, forever. Independent research shows that the Big Brothers Big Sisters model of professionally supported relationships between young people and their adult mentors has a direct, measurable and lasting impact. Children in our program perform better in school, are less likely to skip classes and school days, and more likely to avoid risky, unhealthy behaviors and have higher self-esteem and aspirations.