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This study is aimed at exploring how different formulations of the same mathematical item may influence students' answers, and whether or not boys and girls are equally affected by differences in presentation. An experimental design was employed: the same stem-items (i.e., items with the same mathematical content and question intent) were formulated differently and administered to a probability sample of 1647 students (grade 8). All the achievement tests were anchored via a set of common items. Students' answers, equated and then analysed using the Rasch model, confirmed that different formulations affect students' performances and thus the psychometric functionality of items, with discernible differences according to gender. In particular, we explored students' sensitivity to the effect of a typical misconception about multiplication with decimal numbers (often called "multiplication makes bigger") and tested the hypothesis that girls are more prone than boys to be negatively affected by misconception.

The COVID-19 crisis has strongly affected the school system. In Italy, at-distance forms of didactics have been activated, changing the physiognomy of schools in terms of social interaction, practices and the identity of the individuals. In this paper, we address the issue of how teachers are facing the crisis: our focus is on assessment, as a key variable catalyzing personal history; beliefs; the interface between students; teachers and the school system. We study teachers' beliefs as part of their identities and assessment as a fundamental variable of beliefs. A qualitative content analysis of the open-ended answers to an online questionnaire is carried out to understand the main characteristics associated with assessment by teachers and the obstacles to overcome in the context of long distance learning (LDL). The data show that teachers did not identify valid assessment methods for LDL during the lockdown, especially due to the lack of control over the students. A misconception emerges concerning the definition of formative assessment together with a new awareness of the possibilities offered by digital technologies regarding the individualization of didactics. This study helps to understand which teachers' beliefs are related to assessment are and how they are shaped.

The research described in this paper focused on the issue of describing and understanding how mathematical discussion develops in a hybrid learning environment, and how students participate in it. The experimental plan involved several classes working in parallel, with pupils and teachers interacting both in their real classrooms and in a digital environment with other pupils and teachers. The research was based on a rich set of data collected from the M@t.abel 2020 project, which was developed in Italy during the COVID health crisis. Based on Complementary Accounts Methodology, the data analysis presented in this paper involved specialists from the fields of mathematics education and inclusive education. In the study we considered the complexity of learning and the different elements that have an impact on students' activity and participation, when they are engaged in mathematical discussions within the multilevel-digital environment that emerged due to the pandemic. These parallel analyses showed that 'mathematical discussion in the classroom' is a complex (and sometimes chaotic) phenomenon wherein different factors interweave. A complementary approach assists in developing a global vision for this dynamic phenomenon and in highlighting local episodes that are crucial in this interplay of factors. It is precisely in these episodes that the role of the teacher is fundamental: these episodes appear as catalysts for the different variables, with the teacher acting as mediator.

In this paper we interpret pervasive difficulties with second degree inequalities as a macro-phenomenon emerging from Large Scale Assessment. In line with the theory of reification, we link common students' difficulties to approaches they use that undermine the intertwining of processes and the ensuing emergent mathematical objects. To frame the movement from process to object, we network the theory of objectification with Duval's semio-cognitive approach. We conclude that students' difficulties can be traced back to a disruption of the dialectical movement between process and object. Thus, the students lose the link to meaning, rooted in mathematical activity, and handle semiotic transformations out of the object-sign relation. Such a phenomenon is conceived as a macro-phenomenon emerging from the Italian educational system.

In the frame of national Italian standardized assessments in mathematics, a didactic phenomenon has been observed concerning students' behaviour when answering an item: students are inclined towards not accepting an output which is not clearly recognizable with something distinct from the starting inputs. The observed effect seems to originate from the teacher-student relationship and could be described as a typical didactic contract situation but it also affects the general relationship between the student and mathematics. Adopting a mixed-method apparatus including large-scale assessments results, questionnaires and interviews, we can describe several behavioural features related to the observed phenomenon. In particular, we show how it is present in different grades and in pupils of different abilities. We consider the 'ruling principle' as a connecting concept for the different constructs used here to analyse this phenomenon, i.e. an organizational or normative criterion that shapes the action of the student facing a mathematical task.

The process of pairing a name with representations or peculiar properties permeates many mathematics classroom situations. In school, many practices go under the label 'definition', even though they can be very different from what mathematicians conceive as a formal definition, and in fact there are substantial differences between these different kinds of practices. This can create difficulties for pupils, since they may encounter non-coherent definitions of the same thing. Features of these schemes are exemplified through the analysis of some algebra high school textbooks, looking at the proposed 'definitions' of monomials and polynomials. We show how all these definition schemes are used in textbooks. Starting from the observed differences, we highlight some educational research problems.

This article discusses the benefits of integrating storytelling and narrative techniques into teaching practices across various disciplines. The papers in this Special Issue highlight the transformative power of narrative in enhancing educational experiences, particularly in complex subjects like protein biosynthesis, geometry, recursive thinking, optics, and scientific phenomena. The studies demonstrate how storytelling can demystify complex concepts, engage students, aid in retention and application of knowledge, and foster interdisciplinary learning. Overall, the integration of storytelling in education can enhance students' understanding, retention, and enthusiasm, leading to more effective learning experiences across various disciplines. [Extracted from the article]