Arithmetic Teacher (1959) Vol. 6, No. 6

  • Arithmetic Teacher (1959) Vol. 6, No. 6

    The . . . Arithmetic . Teacher •• . ~ , , • .' ' • 'I • ... • 0 , O• ~~ • • • • 0 •' • 1 .:.~,:~;. ' •. 0 , ,'•::, ~', --. . . .. -. ~-.: -... ---. .. : . , -~ :_ . . . . . . ~~_::_c . . -. DECEMBER • 1959 To Hold the Mirror to Show the Age and Body of the Time RUDOLPH E. LANGER The Hundred-Board MARVIN C. VOLPEL Th