Forty-two junior high level students were instructed in use of the soroban, a type of abacus. Prior to instruction, the students were tested with an easy test and a difficult test to determine their skill in computation of whole and decimal numbers. After four months and again after eight months of instruction and practice with the soroban, the students were tested with equivalent tests. The results demonstrated that the soroban is a practical and efficient approach for overcoming computational problems encountered by the blind.
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