Popper Numbers teaching cards, about 1960
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Science Museum Group
© The Board of Trustees of the Science Museum
Teaching aid, Set of 'Popper Numbers' flash teaching cards for division, designed by Edward W. Dolch, Ph.D. and produced by The Gelles-Widmer Company, St. Louis, Missouri, USA, c. 1960.
Details
- Category:
- Mathematics
- Object Number:
- 2001-306
- Materials:
- cardboard, paper (fibre product) and card
- Measurements:
-
overall: 25 mm x 150 mm x 100 mm, , .25kg
- type:
- teaching aid and mathematical toy
- credit:
- Sade's Attic
