Multi-dimensionality is introduced by framing the comparison between the macroscopic and microscopic
approach within the epistemological debate on possible ways of knowledge organization (theories). In particular,
specific activities were planned (questionnaires and collective discussions) to reflect on the two approaches in the
light of Einstein’s paper about the “theories of principles” and “constructive theories” (Einstein, 1919).
As far as longitudinality is concerned, it is implemented by the choice of making conceptual knowledge progress,
along the thermodynamics curriculum, according to the following leading question: How does the game of modeling
change from mechanics to thermodynamics