The article presents a method of explaining the principles of 3D graphics through making a revolvable and sizable orthographic parallel projection of cuboid in Excel. No programming is used. The method was tried in fourteen 90 minute lessons with 181 participants, which were Informatics teachers, undergraduates of Applied Informatics and gymnasium (grammar school) students. Questionnaire surveys were conducted. The results are being discussed.
This work highlights the importance of verbal creativity, providing a productive online discourse definition, in which students intertwine convergent and divergent thinking by means of a transactional and controversial dialog. Developing the formulated productive online discourse definition, it is also presented and evaluated, an original scaffolding process designed here to further collaborative knowledge building, during ill-structured problem-solving, focusing on creativity and innovation. Evidence from qualitative online discourse analysis indicated an improvement in the knowledge building processes, and knowledge advancement and deepening after teacher's scaffolding.