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Currently displaying 1 – 4 of 4

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Helena Siwek — 2005

Didactica Mathematicae

The article contains no abstract

Concept development of students with specific difficulties in the learning of mathematics

Helena Siwek — 1997

Didactica Mathematicae

The article contains no abstract

The concept of proportional quantities and of number in special-school children as compared with normal-school children

Helena Siwek — 1990

Didactica Mathematicae

The article contains no abstract

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Helena Siwek I Eugeniusz Wachnicki — 1992

Didactica Mathematicae

The article contains no abstract

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