There have been a growing number of exhibitions in the last few years which have produced resources which will be useful for teachers of this option. The links suggested here are only starting points for teachers, as Google Images and other common search platforms will provide a wealth of resources related to these shows.
New York Metropolitan Museum of Art, Autumn 2015: Kongo, Power and Majesty
British Library, October 2015-February 2016: West Africa: Word, Symbol, Song