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Symmetries in plane and space. Congruence transformation as a cover transformation of figures. (Symmetrien in der Ebene und im Raum. Kongruenzabbildungen als Deckabbildungen von Figuren.) (German)
Grundsch. Math. 49, 32-35 (2016).
Classification: G52 G42 E42
1
“Two reflections always result in a rotation." Examining reflections and rotations at a rectangle. (“Zwei Spiegelungen ergeben eine Drehung" Untersuchungen von Spiegelungen und Drehungen am Rechteck.) (German)
Grundsch. Math. 49, 20-23 (2016).
Classification: G52 G42 D42
2
Reflecting parrots. The change of direction in reflecting. (Papageien spiegeln. Der Richtungswechsel beim Spiegeln.) (German)
Grundsch. Math. 49, 7-9 (2016).
Classification: G52 G42 D82 G22
3
The symmetric cow. Constructing own mirror puzzles and exploring symmetries. (Die symmetrische Kuh. Eigene Spiegelrätsel erstellen und Symmetrien erkunden.) (German)
Grundsch. Math. 49, 24-27 (2016).
Classification: G42 G52 D42 A22
4
Symmetries in a picture book. The book “Some are different" as an occasion for reflections about symmetry. (Symmetrien im Bilderbuch. Das Buch “Manche sind anders" als Reflexionsanlass für Symmetrie.) (German)
Grundsch. Math. 49, 14-16 (2016).
Classification: G42 U62 G52 G22 D42
5
“Are we today working in the workshop again?" First experiences with axial symmetry in the plane. (“Arbeiten wir heute wieder in der Werkstatt?" Erste Erfahrungen mit der Achsensymmetrie in der Ebene.) (German)
Grundsch. Math. 49, 10-13 (2016).
Classification: G42 D82 U62 G52 G22 D42
6
Developmental steps in axial symmetry. How manufacturing methods can build on previous knowledge. (Entwicklungsschritte bei der Achsensymmetrie. Wie Herstellungsverfahren auf Vorkenntnissen aufbauen können.) (German)
Grundsch. Math. 49, 4-6 (2016).
Classification: G22 G42 G52
7
An eye on achievements. Observing the understanding of spatial symmetry differentiated and process-related. (Leistungen im Blick. Symmetrieverständnis differenziert und prozessbezogen beobachten.) (German)
Grundsch. Math. 49, 28-31 (2016).
Classification: D62 G42 G52 D42 C62
8
Children’s understanding of large-scale mapping tasks: an analysis of talk, drawings, and gesture. (English)
ZDM, Math. Educ. 47, No. 3, 451-463 (2015).
Classification: G52 C52 C32
9
Scratch it out! Enhancing geometrical understanding. (English)
Teach. Child. Math. 21, No. 3, 185-188 (2014).
Classification: G52 U72
10
Supporting the understanding of spatial symmetry. Reflections of constructions made of cubes. (Räumliches Symmetrieverständnis fördern. Spiegelungen von Würfelbauwerken.) (German)
Math. Differ. 4, No. 3, 41-46 (2013).
Classification: G22 G42 G52 U62
11
Children explore rotational symmetry. (Kinder erkunden die Drehsymmetry.) (German)
Math. Differ. 4, No. 3, 36-40 (2013).
Classification: G22 G52 U62
12
Line reflections with the reflection book. (Achsenspiegelungen mit dem Spiegelbuch.) (German)
Math. Differ. 4, No. 3, 28-34 (2013).
Classification: G22 G52 U62
13
Seeing beauty. Multiple reflections in kaleidoscopes and suchlike. (Schönes sehen. Mehrfachspiegelungen in Kaleidoskopen \& Co.) (German)
Math. Differ. 4, No. 3, 22-27 (2013).
Classification: G22 G52 U62
14
Different approaches towards the concept of symmetry. (Auf unterschiedlichen Wegen zum Symmetrieverständnis.) (German)
Math. Differ. 4, No. 3, 16-21 (2013).
Classification: G22 G52 U62
15
Symmetry ‒ a manifold concept. (Symmetrie ‒ ein vielfältiger Begriff.) (German)
Math. Differ. 4, No. 3, 10-13 (2013).
Classification: G22 G52 D32
16
“Mirror, mirror on the wall\dots”. Competencies for a concept of symmetry in primary education. (“Spieglein, Spieglein an der Wand \dots”. Kompetenzen für einen Symmetriebegriff in der Grundschule.) (German)
Math. Differ. 4, No. 3, 6-9 (2013).
Classification: G22 G52 D32
17
Experiences of symmetry. (Erfahrungen zur Symmetrie.) (German)
Math. Differ. 4, No. 3, 4-5 (2013).
Classification: G22 G52
18
Symmetry of flags. (English)
Prim. Math. 16, No. 3, 6-8 (2012).
Classification: G52 G22
19
Geometric transformations. (Trasformazioni geometriche.) (Italian)
Matematica nella Scuola Primaria, Percorsi per Apprendere 11. Bologna: Pitagora Editrice (ISBN 88-371-1846-5). 144~p. (2011).
Classification: G52 G53 D82 D83
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