Zbigniew Semadeni - Vol. 4 Num. 1 (1984) | ||
Action proofs in primary mathematics teaching and in teacher training | 32-34 | |
Zbigniew Semadeni - Vol. 7 Num. 3 (1987) | ||
Children's reactions to verbal arithmetical problems with missing, surplus or contradictory data | 9-16 |
for the learning of mathematics
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