The principles are simple: Everything is split into 12 major divisions. 12 subdivisions along the principles of the Dewey Decimal system are then divided into 10, and then 10 again.
Because of its logical classifications based on school work, this classification is seen by some educators [2] to be more natural and more logical to students than official classifications based on organizational criteria. The last revision took place in 1984. It is still used, in addition to keywords, in IT and some data information organization systems.[3]
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Education Through Work: A Model for Child-centered Learning
By Célestin Freinet, John Sivell
Translated by John Sivell
Published by Edwin Mellen Press, 1993
ISBN0-7734-9303-4, 978-0-7734-9303-2
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Titles in series: A handbook for librarians and students
By Eleanora A. Baer
Published by Scarecrow Press, 1964
1530 page
^Piagetian Research: Compilation and Commentary
By Sohan Modgil, Celia Modgil
Published by NFER, 1976
ISBN0-85633-106-6, 978-0-85633-106-0