Bushmen clans in Nambia apparently use similar bones for calendar sticks today. Make comment on this entry Gerdes, Paulus. On mathematics in the history of sub-Saharan Africa. He also discusses related areas, such as technology, and studies on language and mathematical concepts. A goal of the studies mentioned is apparently to better understand mathematics learning in Africa.
Some studies focus on logic.
Questions on interaction with ancient Egypt are still largely open. A better understanding of Islamic mathematics in sub-Saharan Africa is desirable as well. Includes an extensive bibliography. The ritual origin of counting. It is common to argue that counting and other elementary mathematics arose spontaneously throughout the world in response to a practical, or perhaps psychological, need.