000 00279nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aJournal for Research in Mathematics Education Dr.
260 _aNCTM
_bReston
_c1 Jan-31 Mar,2009
362 _a40-40
_b01-Feb
942 _2ddc
_cJ
999 _c181690
_d181690