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Point- instead of vector-calculus! (Punkt- statt Vektorrechnung!) (German)
Mathematikunterricht 62, No. 4, 15-24 (2016).
Classification: G74
1
What’s new in the upper secondary? How the solving of geometric problems changes. (Was ist neu in der Sek. II? Wie sich das Lösen geometrischer Probleme ändert.) (German)
Math. Lehren 33, No. 196, 34-39 (2016).
Classification: G40 G70 D80
2
What does still fit into it? Modelling with pyramid-shaped tea bags. (Was passt da noch rein? Modellieren mit pyramidenförmigen Teebeuteln.) (German)
PM Prax. Math. Sch. 58, No. 69, 21-25 (2016).
Classification: G40 U70
3
Number triangles and number tetrahedrons. Discovering and developing Pascal’s triangle. (Zalendreiecke und -tetraeder. Das Pascalsche Dreieck entdecken und weiterentwickeln.) (German)
Math. Lehren 32, No. 193, 14-18 (2015).
Classification: F33 D83 Reviewer: Renate Stürmer (Zweibrücken)
4
Illuminating coordinate geometry with algebraic symmetry. (English)
Math. Teach. (Reston) 108, No. 6, 470-473 (2015).
Classification: G74 H24
5
Platonic solids. Geometric concept formation, art and inclusion in one project. (Platonische Körper. Geometrische Begriffsbildung, Kunst und Inklusion in einem Projekt.) (German)
Mathematik 5 bis 10 32, 22-25 (2015).
Classification: M83 G93 G43
6
Measuring angles of tetrahedra. (Winkelmessungen am Tetraeder.) (German)
Wurzel 49, No. 6, 114-119 (2015).
Classification: G40 G70
7
The volume of a stretched tetrahedron; the easy way? (English)
Teach. Math. Appl. 34, No. 4, 205-213 (2015).
Classification: G30 I50
8
Letters from geometry to mathematics. (Briefe der Geometrie an die Mathematik.) (German)
IBDG, Inf.bl. Geom. 34, No. 1, 25-38 (2015).
Classification: G10 M50 M60
9
Triangles as developments of tetrahedras. (Dreiecke als Tetraedernetze.) (German)
Math. Lehren 32, No. 190, 14-17 (2015).
Classification: G43 D83 Reviewer: Renate Stürmer (Zweibrücken)
10
Routh’s theorem for tetrahedra. (English)
Geom. Dedicata 174, 155-167 (2015).
Classification: G35
11
On some remarkable points of the tetrahedron. (Su alcuni punti notevoli del tetraedro.) (Italian)
Archimede 66, No. 4, 172-179 (2014).
Classification: G40
12
Cosines and Cayley, triangles and tetrahedra. (English)
Am. Math. Mon. 121, No. 10, 937-941 (2014).
Classification: G45 H65 G75
13
Geometric loci and homothetic transformations. (English)
Int. J. Math. Educ. Sci. Technol. 45, No. 2, 282-291 (2014).
Classification: G45 G55
14
The diver problem: the surfer problem in 3D. (English)
Math. Teach. (Reston) 106, No. 9, 710-714 (2013).
Classification: G40 G70
15
Pascal pyramids: a mathematical exploration using spreadsheets. (English)
Spreadsheets Educ. 6, No. 2, 7 p., electronic only (2013).
Classification: K20 F60 U70
16
Make four out of three ‒ from a triangle to a tetrahedron. (Aus Drei mach Vier ‒ Vom Dreieck zum Tetraeder.) (German)
Wurzel 47, No. 11, 242-245 (2013).
Classification: G40
17
A chain of inequalities for the special vertex transversals of a triangle. (Eine Ungleichungskette für die besonderen Ecktransversalen des Dreiecks.) (German)
Wurzel 47, No. 7, 149-154 (2013).
Classification: G40 G70 G90
18
Spatial imagination and mathematics education ‒ hands-on activities that make sense. (Raumvorstellung und Mathematikunterricht ‒ Aktivitäten mit Hand und Verstand.) (German)
Mathematikunterricht 59, No. 3, 39-50 (2013).
Classification: G40 G70 U60 U70
19
Make maths fun. (English)
Math. Sch. (Leicester) 42, No. 3, 12-14 (2013).
Classification: U70 G10 U60 H40 K30 U50 D80
20
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