I-tri girls, an East Hampton-based nonprofit that teaches middle schoolers to believe in themselves through training and completion of a yearly triathlon, is expanding to the Bridgehampton and Riverhead school districts. Celebrating 10 years, the program is now in 10 schools, helping 200 girls. I-tri girls is in the early stages of starting to scale nationally. An online vacation auction will begin February to raise money for properties in Costa Rica, France, and the Hamptons. To learn more about i-tri girls visit www.itrigirls.org.