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2012f.00660 Ballering, Frans The metric system. (Het metriek stelsel.) Euclides 87, No. 6, 270-271 (2012). 2012 Nederlandse Vereniging van Wiskundeleraren (NVvW), Zoetermeer NL G30 D40 metric system The author reports experiences with lessons on the metric system and makes didactical suggestions. Martin Winter (Vechta)