Katherine Johnson grew up during a time when women were not encouraged to excel in the fields of math and science, and when African-Americans were heavily discriminated against. But she was so good at math that she zoomed ahead of her elementary school classmates, attended a high school far away from home, and started college at age fourteen, taking difficult geometry classes taught just for her. She went on to become one of NASA's "computers who wore skirts," women who did calculations that helped the men engineers design flight plans and rockets.