The specific teaching unit with modelling problems developed in DISUM had positive
effects on students’ enjoyment, interest and self-efficacy expectations for all three types of problems addressed. This finding is in line with some others studies. In contrast, the perceived value of solving such problems was not affected by the teaching unit.
For changing perceived value, an intervention programme specifically tailored to impact value would likely be necessary. Other studies indicate that positive changes in task values can improve affect and academic achievements in mathematics in self-regulated learning environments (e.g. Metallidou & Vlachou, 2010).