I love the In Pictures section of the BBC News website because not only does it host great collections of images about current world events, it also hosts audio slideshows about a wide range of current and historical topics. One of the audio slideshows that I recently discovered and enjoyed watching is Mapping Africa. Mapping Africa is a five minute narrated overview of the changing map of Africa from the 14th Century through today. The slideshow features explanations of the features of different historical maps of Africa.
World History textbooks have made progress in including more information about the history of Africa, but there is always more that could be included. Mapping Africa could be a good multimedia resource to supplement the content about found in a typical high school World History textbook.