• Journal for Research in Mathematics Education (1991) Vol. 22, No. 3

    ISSN 0021-8251 JOURNAL FOR RESEARCH IN _\1ATHEMATICS EDUCATION VOLUME 22 NUMBER 3 MAY 1991 National Council of Teachers of Mathematics The J ournal for Research in Mathematics Education. an orlicial journal of the ationul Council ofTeache~ of Mathcmnuc~. is devoted to the tnlerests of teachers of mathematics and mathem