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NUMDRUM

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Visit this site: http://www.numdrum.com/
Author:John T. Harrison
Description: The "Numdrum" helps children understand addition, subtraction, and other fundamental arithmetic concepts. An alternative to the number line and the 10 x 10 number square, this "decimal helical number line" lists integers around a tube, ten to a turn, in an upward spiralling helix. Comes with a "cursor" sleeve. Watch the video; read reviews, teachers' notes, and activities; learn about suppliers and direct sales.
Levels: Elementary, Middle School (6-8)
Languages: English
Resource Types: Manipulatives, Educational Vendors
Math Topics: Addition, Division, Number Sense/About Numbers, Patterns/Relationships

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