In this issue, the article titled On students’ concept-image of elementary notions of nonstandard analysis is available in English.
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Research and reflection
On students’ concept-image of elementary notions of nonstandard analysis
Mirko Maracci and Ambra Marzorati
Beliefs of primary school teachers and mathematical problems
An inquiring-game activity to discover geometry theorems
Carlotta Soldano and Gaetano Di Caprio
Teaching and learning experiences
Developing and assessing argumentative competences in mathematics: an educational path for primary school
Anna Maria Brunero and Monica Panero
An experience of History of Mathematics in lower secondary school: the quadrature of plane figures
Vittoria Fontana Bollini and Giovanna Lepori
Book reviews (in Italian)