American School Students Partcipate Abacus Contest
— Автор admin, дата 19 февраля, 2012, время 17:57
A Student moves a bead on an abacus
during the 27th annual abacus contest at the New Sanno Hotel on May 20, 2009 in Tokyo, Japan. American schools in Japan have brought in abacuses to develop the children’s calculating ability since 1981.