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"...Consists of two parts,the second of which is an adaptation of 'Les nombres en couleur' by G. Cuisenaire,written in French for Belgian teachers,and with a strong bias towards the official syllabus. The first part,by C. Gattegno,suggests a practical application more in keeping with the character.
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Numbers in colour : a new method of teaching the process of arithmetic to all levels of the primary school by Georges Cuisenaire. Published by Heinemann in 1954. Publication and catalogue information, links to buy online and reader comments.