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This paper focuses on two main objectives. The first, to describe and characterise instrumental approach involving artefact and instrument differentiation, instrumental genesis and orchestration along with the instrument-mediated activity model. The second, to present and discuss one of five cube cross-section lessons designed and carried out in our mixed methods research project. Altogether, a paper workbook, dynamic applets and 3D prints form a five-set toolkit, each corresponding to one of the five designed lessons. The main research idea was to explore how digital and physical manipulatives could be integrated into solid geometry lessons to support the development of students’ visualisation. In this paper, Lesson 2 will be described in detail, which, like the others, has been particularly influenced by the instrumental approach. Its individual attributes will be depicted according to the personally adapted activity model.

Designing Combinations of Physical and Digital Manipulatives to Develop Students’ Visualisation