PURPOSE: To easily handle the fraction set at the time of learning fractions and to prevent the generation of adverse effects upon periphery by preparing fraction plates with width obtained by dividing the length of one side of a reference plate by a natural number equally to the number of natural numbers.

CONSTITUTION: Each of fraction plates 2 to 6 with width obtained by dividing the length of one side of a reference plate 1 by each of natural numbers 2 to 6, 12, etc., are prepared equally to the number of natural numbers and these plates are combined and used. These fraction plates can easily be handled at the time of learning fractions, and since water or the like is not used, the generation of advese effects upon the periphery can be prevented.