The connection between education and knowledge is quite clear. People who are educated know more. They are more likely to be able to read, which is a common measure of human development.
Education is also closely connected to wealth. If Africans get better education, they will be able to find or even to create better jobs. An educated person is, for example, more likely than an uneducated person to be able to manage a business. People with more education will have more knowledge of things like technology and might be able to innovate in ways that will increase the wealth of their countries. By contrast, people with very little education generally have only the skills that are needed for menial jobs that do not add much to a country's economy.