Somalia, Baidoa, Children walking to Dr Ayub Primary School carrying textbooks and abacus.

China, Shanghai, Revolutionary kitsch on sale at at Dongtai antique market, Chairman Mao Zedong and Che Guevara and Red Star shoulder bags Chinese characters read Serve the People, Lin Biao calendar a...

Education, School, Tools, Abacus or counting frame a calculating tool used primarily in parts of Asia for performing arithmetic processes.

Schoolgirl standing with other children using an abacus.

Farner using an abacus to do his accounts.

Farner using an abacus to do his accounts.

Boy using an abacus in school classroom with blackboard on wall behind.

Ali Osman Primary School. Girl using abacus in classroom.

Young school girl using wooden abacus