hmmm...
Since you have chosen the subject and you have the instructions the rest is easy, I think. :)
You can first explain the poverty in Africa, by all its contents; how people suffer there etc. And then you can explain the cause of it, what causes the poverty in Africa although the continent is very rich with diamonds, rice and many more and people are very wise about nature.
Then, as your teacher asks you, evaluate other existing solutions (which apparently do not contribute)
And stage is yours, talk about your own solution, mine would be, NO COLONY! and to let those people work for themselves not for others. (remember the film of Leonardo di caprio?? or zeitgeist addendum can help you for to have an idea, try them.)
You can persuade your reader, how miserable those people are and how wasting we are, and by such things...
I like your subject. It is sad to talk about it but it is something people should do, and hopefully not only talking.
~*Chidem*~