This special issue of the American Journal of Education, ''Reforming t
he Third R,'' arose from the feeling that readers of this journal, who
tend to be interested in ideas, issues, research, and practice in edu
cation broadly conceived, might benefit from a more detailed look at o
ne particular area, the changing mathematics curriculum. Its goal is t
o provide to the education scholar community a picture of the motivati
ons for, theories behind, work of, results from, and implications of t
he current wave of curriculum reform in mathematics education.