There's a massive educational game being leveraged right now that you probably haven't heard of. It's called Skoolbo and, as of this posting, has seen students answer more than 8 million literacy questions in just under half a year. Literacy scores have improved by an average of 22% since students started using the service.
This short United-Eye Productions video employs free-style animation to show five key ways that education is improved by technology: Global learning Game-based learning Virtual worlds, digital simulations, and models Mobile learning Real-time data-based decision making
Some more lesson plans about africa including some interesting historical units. I also love the one titled "Africa, It's not a country" (there are even many adults that treat Africa like a country not a continent.)