Mathematics Teacher (1970) Vol. 63, No. 4
NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS APRIL 1970 VOLUME LXIII , NUMBER 4 On the Solution of a Problem James W. Wilson and J erry P. Becker Use of Summation Operators for the Derivation of Common Formulae Ronald L. /man A Case for Flexibility in Classroom Instruction Elaine K i vy Genkins A Construction of and Phy
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