Mathematics Teacher (1997) Vol. 90, No. 8

  • Mathematics Teacher (1997) Vol. 90, No. 8

    NATIONAL COUNCIL OF TEACHERS OF MATHEMAT I CS MATHEMATICS TEACHER NOVEMBER 1997 Volume 90 Number 8 • ACTIVE LEARNINC • PERFECT NUMBERS • FISHY FORMULAS 1'1 rrC'alr>d tlw C'atculator-Based Ranger' (CBR' ), an inlelli.r;ent motion detector that makes ('()/{r>rling and anal.l)zing data .faster, easiPr and more accurate th