• Journal for Research in Mathematics Education (1989) Vol. 20, No. 1

    ISSN 0021-8251 JOURNAL FOR RESEARCH IN MATHEMATICS EDUCATION VOLUME 20 NUMBER 1 JANUARY 1989 National Council of Teachers of Mathe1natics The journal for Research in Mathematics Ed11cation is devoted to the inte rests of teachers of mathematics and mathematics education at all levels-preschool through adult. The public