Arithmetic Teacher (1965) Vol. 12, No. 1
THE ARITHMETIC TEACHER Volume 12, number 1 JANUARY 1965 In trasystem research L eonard Pikaart and for elementary school teachers Charles Berryman Homework in arithmetic Elmer A . Koch, J r. Discovery in mathematics Ernest R. Ranucci Programmed instruction Glen E . Fincher and in elementary arithmetic H. T. Fillmer Ret
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