How many think Liam is home right now playing Civilization as the Zulu's trying to formulate his answer?
Nah, been on Fifa.
Right, basically TW's answer was actually good IMO. I'd do most of the same things but in a different order, with a few others.
You can't just say to someone that the earth revolves around the sun, just because you're a warlord. I think you'd need to further prove your knowledge by 'discovering' things. One example might be penicillin. I assume there are cows/goats in Africa, and therefore you could make cheese from the milk, and let mould grow on it, and there you go, you have food with magical healing powers.
The water filtering thing is also good, clean water supplies would be handy.
Again, the 'changing the role of women in society' certainly wouldn't be something you could just implement. People would have to trust you to undergo such a radical change, which, let's face it, it would be.
One thing I'd probably do first though, would be to develop weapons. Obviously not guns and tanks, but more developed melee weapons, and the same with armour. This way we fight other tribes/countries, which would earn me more respect as a leader, as we'd have more land and resources as a country. Then you can start talking to your Michael Gove/Ed Balls types about implementing a new education system.