Abstrakt
One of the research questions answered in this article came up as we analysed some TIMSS and PISA tasks, where a name of fictive currency (ZED) was used. Does the use of the fictive currency name influence pupils' performance? Is the effect significant? We selected 4 different tasks in two variants and tested pupils in grades 3 (task 3B, N=173), 4 and 5 (task 4A, N=700) and 7 (task 7A and 7C, N=255).
The tasks were assigned in pairs - one in the local currency (crowns or CZK) and the other in currency ZED. The results were mixed: while we found a significant difference for one task in grade 7, the differences for other tasks and grades were not significant.
We also investigate the pupils' coordination of units and analyse their main solving strategies and mistakes in these tasks.