[educational ephemera, learning aids]
Kibbe Number Drill Cards
Ninety-Six Combinations for Rapid Drill Work, including all combinations of the addition, subtractions and multiplication tables and many of the division table combinations. Complete set of 48 number cards + 1 instruction card, 3 x 5 inches each. Very Good with general handling soil. Original box a bit battered and soiled, but mighty sturdy nonetheless. Distributed by the Ideal School Supply Co.