Meanings given to algebraic symbolism in problem-posing

Some errors in the learning of algebra suggest that students might have difficulties giving meaning to algebraic symbolism. In this paper, we use problem posing to analyze the students’ capacity to assign meaning to algebraic symbolism and the difficulties that students encounter in this process, depending on the characteristics of the algebraic statements given. We designed a written questionnaire composed of eight closed algebraic statements expressed symbolically, which was administered to 55 students who had finished their compulsory education and who had some previous experience in problem-posing. In our analysis of the data, we examine both syntactic and semantic structures of the problem posed. We note that in most cases students posed problems with syntactic structures different to those given. They did not include computations within variables, and changed the kinds of relationships connecting variables. Students easily posed problems for statements with additive structures. Other differences in the type of problems posed depend on the characteristics of the given statements.     

“We do not know what is the real story anymore”: Curricular contextualization principles that support indigenous students in understanding natural selection

We propose a process of contextualization based on seven empirically derived contextualization principles, aiming to provide opportunities for Indigenous Mexican adolescents to learn science in a way that supports them in fulfilling their right to an education aligned with their own culture and values. The contextualization principles we empirically derived account for Nahua students' cultural cognition, socialization, and cultural narratives, thus supporting Indigenous students in navigating the differences between their culture and the culture and language of school while learning complex science concepts such as natural selection. The process of curricular contextualization we propose is empirically driven, taking culture and socialization into account by using multiples sources (cognitive tasks to explore teleology, ethnographic observation of students' community and classroom, and interviews with students and community members) and builds on the scholarship in Culturally Relevant Pedagogy and Indigenous Education. We used these principles to redesign a middle school biology unit on natural selection to make it more culturally relevant for Nahua students. The enactment of this unit resulted in students being engaged in science learning and achieving significant learning gains. The significance of this study lies in presenting evidence that learning science in culturally relevant ways supports the learning of challenging biology concepts. We provide evidence that Western science can be learned in ways that are more aligned with Indigenous students' Traditional Indigenous Knowledge, thus informing the implementation of educational policies aiming to improve the quality of secondary education for Indigenous adolescents. Our proposed contextualization principles can benefit students of all cultural identities who feel that their religion, language, or traditional knowledge are not aligned with school science, facilitating their access to culturally relevant science education.     

Environmental Learning of Social Cues: Evidence From Enhanced Gaze Cueing in Deaf Children

The susceptibility to gaze cueing in deaf children aged 7–14 years old (N = 16) was tested using a nonlinguistic task. Participants performed a peripheral shape-discrimination task, whereas uninformative central gaze cues validly or invalidly cued the location of the target. To assess the role of sign language experience and bilingualism in deaf participants, three groups of age-matched hearing children were recruited: bimodal bilinguals (vocal and sign-language, N = 19), unimodal bilinguals (two vocal languages, N = 17), and monolinguals (N = 14). Although all groups showed a gaze-cueing effect and were faster to respond to validly than invalidly cued targets, this effect was twice as large in deaf participants. This result shows that atypical sensory experience can tune the saliency of a fundamental social cue.     

Teachers' beliefs and integration of information and communications technology in Italian schools

Abstract

The goal of the present study was to examine teaching styles with information and communications technology (ICT); in Italian schools and in particular to explore whether there is a relationship between personal theories of teaching and learning, levels of competence in ICT, and how ICT is integrated into classroom activities. Teachers with high and low levels of competence in ICT were interviewed in order to examine their beliefs, perceptions, and experiences related to teaching with and without the computer. They were asked to reflect both on themselves as teachers and on their pupils. The results of this preliminary study appeared to indicate that both personal theories of teaching and the level of competence with ICT play a major role in how teachers implement ICT and in their perception of their own and their pupils' motivation     

Some Learning Problems Concerning the Use of Symbolic Language in Physics

This paper aims to draw the attention of teachers of basic university physics courses towards students' problems concerning the interpretation of the symbolic language used in the discipline. Specific difficulties found in the first course of physics, related to different kinds of statements expressed in mathematical language, are pointed out and analysed, and some suggestions are made to cope with them during instruction. It could be concluded that teachers may need only to reflect and comment on the virtues of making explicit the semantic and syntactic aspects of formal languages as they teach physics.     

Reading prosody development in Spanish children

Reading prosody is considered one of the essential markers of reading fluency, alongside accuracy and speed. The aim of our study was to investigate how development of reading prosody in Spanish children varies with sentence type and length. We compared primary school children from the third and fifth grades with an adult sample. Participants were recorded reading aloud a narrative text including short and long declarative, exclamatory and interrogative sentences. Recordings were analysed using Praat software to measure several prosodic features (i.e., pauses, duration, pitch and intensity). We found that third-grade children had not yet developed an adult-like prosody: they made more pauses, had a flatter melodic contour and had difficulty anticipating sentence structure. Fifth-graders displayed some features of adult prosody. Both length and type of sentence influenced the expressiveness of reading in the three groups. We conclude that reading expressiveness is closely related to reading experience and develops in a similar way to decoding and reading speed.