On the topic of equations - what does = mean? (Zum Thema Gleichungen - was bedeutet eigentlich = ?) (German)
Mathe-J., No. 2, 1 (2004).
1
Experiencing mathematics: Problem solving in Socratic group discussions. (Mathematik erfahren: Problemlösen im sokratischen Gruppengespräch.) (German)
Mathe-J., No. 2, 2-4 (2004).
2
Intuitve solutions of equations. (Seekuhmamas und Menschenkinder.) (German)
Mathe-J., No. 1, 1-2, 4 (2004).
3
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