Never take your eye off the ball. Always remember that you and everyone on the team is the servant of the cause - in our case, girls' education and young women's leadership in Africa.

For the poor, learning to manage money well is central to improving their lives.

For more than 20 years, Camfed has supported a generation of African girls and women with access to secondary and higher education, employment opportunities, and, ultimately, into positions of leadership.

When I first worked in Zimbabwe, I was a complete novice. I was doing a study, and I continued to learn more and more through the years. And where I have learned most is in the village, from the communities.

My own foundation concentrates on women's economic empowerment on the basis that if women have their own money and are able to support themselves, they can make choices about what happens to them in their lives, about whether they have education, whether they get married, and what happens to their children.

I went to Brooklyn College as an education major. It was a big deal in the family, but really, I was living for Mom and Dad.

India, with one of the largest education systems in the world, has always been a priority for Khan Academy.

The teacher would say, 'Not everybody makes it as a footballer, so what do you want to be?' I'd say, 'A footballer.' The teacher would say, 'But not everybody makes it. So what do you want to be?' I'd say, 'A footballer.' Every year that happened! Nothing was going to get in the way of me being a footballer.