New directions for elementary school mathematics /

New directions for elementary school mathematics / Paul R. Trafton, 1989 yearbook editor. - Reston, Va. : National Council of Teachers of Mathematics, 1989. - viii, 245 pages : illustrations ; 24 cm. - Yearbook / National Council of Teachers of Mathematics, 1989 0077-4103 ; . - Yearbook (National Council of Teachers of Mathematics) ; 1989. .

Includes bibliographical references.

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