Impact Stories of impact, like this one for Dana-Farber Cancer Institute, can motivate other donors to give generously. This businessman is giving away 90 percent of his wealth. A long-ago meeting with Mother Teresa motivated him to do it. This magazine for Miss Porter's School keeps far-flung alumnae and parents connected to the all-girls independent school in Connecticut. The Boston Foundation's centennial was the occasion to highlight the many ways the foundation has helped improve the lives of Bostonians.