The Visual Soroban Project

References, Books

Spatial Ability: a Handbook for Teachers.

Clausen-May, Tandi, and P. Smith.

Slough, UK: National Foundation for Educational Research, 1998.

Elementary Mathematics and Language Difficulties.

Grauberg, E., London: Whurr Publishers, 1998.

The Japanese Abacus: Its Use and Theory.

Kojima, Takashi.

Rutland, VT: Ch. Tuttle, 1954.

Advanced Abacus: Japanese Theory and Practice.

Kojima, Takashi.

Rutland, VT: Ch. Tuttle, 1963.

Introduction to the Soroban.

Markarian, Kimie, Tandi Clausen-May, and Sue Pope.

Derby, UK: Assocition of Teachers of Mathematics, 2004.