10.  Perforated Division Board -Materials (EN subtitles) Math-Ools interactive book
Channel: PASOS ONG
Date: 2020-01-10

Interactive book of the Erasmus+ project: "Math Methodologies and tools for elementary school" KA201 (2018-1-NO01-KA201-038876). Part 1: Materials.
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"The European Commission's support for the production of this publication does not constitute an endorsement of the contents, which reflect the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein."