Abstract: GeoGebra has its strength in creating multimodal dynamic and interactive math applets and is widely used in secondary school math teaching. STACK is particularly strong in generating randomized tasks with adaptive feedback and is mostly used in university-level math teaching. The Erasmus+ project AuthOMath (2022?2024) aims to combine the strengths of both systems in an authoring tool with a transformative digitization potential in mathematics teaching and learning.

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