• Journal for Research in Mathematics Education (1991) Vol. 22, No. 1

    ISSN 0021-8251 JOURNAL FOR RESEARCH IN MATHEMATICS EDUCATION VOLUME 22 NUMBER 1 JANUARY 1991 National Council of Teachers of Mathematics The Journal for Research in Mathematics Educatiion an official JOurnal of the National Council of Teachers of Mathematics. i> devoted to the intereM~ of teachers of mathematics nnd ma