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Difficulties to measure. Mixed-age groups solve them together. (Probleme beim Messen. Altersgemischte Gruppen lösen sie gemeinsam.) (German)
Prax. Grundsch. 32, No. 2, 23-24 (2009).
Classification: F72 D72 D42 D82
1
Mathematical challenges for grades 1 to 4. (Mathematische Herausforderungen. Differenziert fordern - individuell fördern.) (German)
Grundschule 41, No. 3, 6-42 (2009).
Classification: D52 D42
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