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Teaching and Learning of Geometry as a process of Objectification: conditions and obstacles to argumentation and proof. The role of natural language, specific language, and figures

Exploring the ELT Observer’s Subject Positions: Tensions, Negotiations, and Contradictions

Some Examples of The Phenomenon of Metadidactic Slippage in School Practice

La teoria dell’oggettivazione e la teoria delle situazioni didattiche: Un esempio di confronto tra teorie in didattica della matematica