[i]I have implemented this lessons more than once. It had to be adapted function by the students' math level. The students who have not developed yet the formal logic or those just learn slowly would benefit more by the practical moments and could not pay attention when formal proofs are written down. The teacher has to find the right balance between practice and formal, such that to stimulate developing the logical thinking without sacrificing any student time.[/i]

[i]The lesson was easier to conduct in the ICT lab, however, it worked in the usual classroom, using a teacher laptop and students' smartphones. Of course, the interactive worksheets were prepared, and the paper models.[/i]

[i]Yes, as I am aware, at least the minimum objectives were reached.[/i]

[i]They heavily appreciated the investigation using paper models, as well as the technology.[/i]

[i]I would like to have an easier access in the ICT lab or have digital devices in every classroom.[/i]