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It is vital that upper secondary students gain a rich and deep knowledge of sustainability issues, as they will enter adulthood and working life within a short time. The students belong to a generation that will be intensely involved in managing several environmental issues to achieve sustainable development for our Earth. However, earlier research indicates that many teachers have a low self-efficacy for teaching sustainability issues. This study aimed to explore how science teacher teams in Swedish upper secondary schools can develop their knowledge and expertise in sustainable development (SD) through collective reflections with the support of the reflective tool Content Representation (CoRe). Science teachers' pedagogical content knowledge (PCK) development in teaching SD was examined. Twelve in-service science teachers participated in the study. The qualitative research design included semi-structured interviews and science teacher teams' collective meetings. The findings covered four themes about how the collective reflections with support of the CoRe tool stimulated teachers' PCK development: (1) creating structure and a focus for learning conversations, (2) modification of the teaching approach, (3) development of new content knowledge and pedagogical knowledge in SD, and (4) shared language to stimulate equal opportunities for students to learn SD. The conclusion is that with the support of CoRe, the teacher team's collective PCK in SD was developed; therefore, we recommend that decision-makers within the school system organize regular meetings in science teacher teams and introduce CoRe to the teachers.

In this qualitative study, we investigated how students and teachers responded to the design of a digital self-assessment tool and how they experienced the use of the tool to support understanding and development of twenty-first century skills when working with makerspace activities. There were 65 lower secondary school students and four teachers participating in the study. We used individual interviews with the teachers and group interviews with the students. Data were analysed with thematic coding of transcripts from interviews. The results showed that the participants found that the tool needed technical improvements, but that they gained some insights into the meaning of the included twenty-first century skills (collaboration, creativity, problem-solving, life/social skills and communication). However, it was particularly difficult for students to understand the meaning of life/social skills and how this connected to makerspace activities. Still, both students and teachers argued that it is possible to develop twenty-first century skills during makerspace activities. Teachers also found connections between the skills and learning objectives in the school subject technology, but also in other subjects. We were unsure of how used students were to self-assessment and we believe that teachers' role is essential, even when it comes to supporting students in self-assessment. Finally, both students and teachers argued that twenty-first century skills are of importance for the future and the project served as an eye-opener in this aspect.

This study focuses on how science teachers' Pedagogical content knowledge (PCK) can be captured and developed with the support of Content representation (CoRe) in combination with video-based reflection when they plan, teach, and reflect on their teaching in sustainable development (SD). The theoretical framework is based on PCK, and the Refined consensus model (RCM) is used as a theoretical lens for conceptualising links between teaching practice and PCK development. Eleven upper-secondary school science teachers participated in the study. Data from two teachers were chosen to illustrate representative examples from the analysis. The findings indicate that the use of CoRe and video-based reflection provides opportunities for teachers to make their knowledge of practice explicit and help them begin to identify aspects within their own practice that are important for the further development of teaching SD. The use of RCM as an analytical tool also makes an important contribution to how RCM can be used to identify and capture teachers' PCK.

Background: Although science and technology are viewed as closely related subjects, they are rarely combined in preschools. Purpose: This article investigates preschool teachers' perspectives on integrating digital tools when teaching science, asking how and why they use digital tools, and examining the affordances they experience and obstacles they encounter when incorporating digital tools. Sample: Eighteen Swedish preschool teachers volunteered to participate in the study. Design and method: Data were collected through group interviews and analyzed using a thematic approach, together with the Technological Pedagogical Content Knowledge (TPACK) framework, to obtain a more detailed picture of the teachers' experiences. Results: Most of the participants were positive about using digital tools when teaching children science, and they emphasized the need for training on how to use the tools themselves. The preschool teachers viewed digital tools as good complements to other tools when teaching science and to find information about science facts. Moreover, there were generic reasons for using digital tools, such as to stimulate critical reflections among the children, to document activities and to create stimulating learning environments. However, one group of preschool teachers struggled with integrating digital tools when teaching science. Discussion: Digitalization in preschools and the rest of society is developing. The preschool teachers found possibilities and challenges in using digital tools when teaching children science. Still, future studies are needed to investigate how this will develop. In addition to the results, we found that TPACK served as a useful framework for analyzing and discussing our results. Therefore, we recommend TPACK when analyzing and discussing the use of digital tools in future preschool studies.

Background: Informal learning environments (ILEs) like Fablabs and Makerspaces have potential to facilitate development of STEM skills. However, these environments might be difficult for teachers to adopt in their teaching because of teaching approaches grounded in constructionism where the role of the teacher changes from a transmissive instructor to an active co-creator, and using high-tech equipment not normally found in schools. Purpose: The aim is to investigate teachers' self-efficacy and perceived role when teaching STEM in Fablabs and Makerspaces. This is investigated related to teaching in ILEs and using high-tech equipment. The study was conducted in two countries/regions, Flanders (Belgium) and Sweden We also compare differences between teachers depending on nationality, gender, and years of teaching experience. Sample: A total of 347 secondary school teachers completed an online survey. Quantitative analyses was used for all questions in the survey, except one open-ended question, which was analysed through inductive thematic coding. Results: The teachers reported moderate self-efficacy for teaching in ILEs , and low self-efficacy for using high-tech equipment. Some teachers described themselves as having active roles as a coach or as co-learner during visits with their students. Others saw themselves as having a passive role. Many teachers did not know what kind of role to take. The teachers who perceived an active role as a teacher in high-tech ILEs reported higher self-efficacy to teach in these environments than other teachers. Conclusions: This study shows that a constructionist approach to teaching is important if teachers are to develop self-efficacy to teach in high-tech ILEs. Thus, developing teacher practices in line with constructionism in relation to teaching in high-tech ILEs is imperative, in teacher education. The results also highlight that staff in Fablabs and Makerspaces are important for handling high-tech equipment. Hence, collaboration between staff in ILEs and teachers is of importance.

This case study aimed to investigate teachers' reflections on the transfer of makerspace activities into classrooms. Primary and secondary STEM teachers participated in a Continuous Professional Development programme about makerspaces. Data were collected in the form of written reflections and semi-structured interviews after the teachers conducted makerspace activities in their classes. A thematic approach was used for data analysis. The results showed that teachers identified possibilities: "Connections to learning objectives in STEM subjects"; "Motivating and engaging students"; "Stimulating collaboration"; "Stimulating creativity"; and challenges: "Problem of assessment"; "Lack of digital competence"; "Lack of high-tech equipment." However, the teachers did not reflect upon the cultural, ontological, and epistemological differences between makerspaces and formal schooling. Thus, we argue that it is difficult 'to eat the cake and have it too', i.e. to fully reconcile both the maker-culture and demands of formal schooling. Rather, we suggest three ways to connect makerspace culture with formal education.

Coherent X-ray imaging is an active field at synchrotron sources. The images rely on the available coherent flux over a limited field of view. At many synchrotron beamlines a double-crystal monochromator (DCM) is employed in a standard nondispersive arrangement. For coherent diffraction imaging it is advantageous to increase the available field of view by increasing the spatial coherence length (SCL) of a beam exiting such a DCM. Here, Talbot interferometry data together with ray-tracing simulations for a (+ − − +) four-reflection experimental arrangement are presented, wherein the first two reflections are in the DCM and the final fourth reflection is asymmetric at grazing exit. Analyses of the interferometry data combined with the simulations show that compared with the beam exiting the DCM a gain of 76% in the SCL was achieved, albeit with a factor of 20 reduction in flux density, which may not be a severe penalty at a synchrotron beamline. Previous efforts reported in the literature to increase the SCL that employed asymmetric crystal diffraction at grazing incidence are also discussed. A much reduced SCL is found presently in simulations wherein the same asymmetric crystal is set for grazing incidence instead of grazing exit. In addition, the present study is compared and contrasted with two other means of increasing the SCL. These are (i) focusing the beam onto an aperture to act as a secondary source, and (ii) allowing the beam to propagate in vacuum an additional distance along the beamline.

Research has revealed that teachers find teaching and assessing socioscientific argumentation (SSA) to be challenging. In this study, ten pre-service science teachers (PSTs) tested a new Practical Assessment of Socioscientific Argumentation Model (PASM) that was developed to enhance skills in assessing SSA. The models' design is based on the Teacher oriented Assessment Framework. Here, we present the characteristics of PASM and examine how PSTs perceive that the use of PASM effects competences in assessing SSA. PASM is divided into multiple phases and requires PSTs to perform three roles: arguing for and against a given socioscientific issue, and assessing other PSTs' argumentation. It also includes group discussion and individual reflection phases. Two cycles of the model were performed, focusing on different issues (GMOs and nuclear power). Data were collected in the form of audio-recordings of group discussions, field notes from whole class discussions and the PSTs' written individual reflections. Thematic data analysis revealed that the PSTs discussed and reflected on four main themes: the focus of the assessment, the tools in PASM, the nature of PASM, and coping strategies. The nature of PASM, with iterative cycles and repeated reflections, expanded their views on assessing this kind of argumentation, making PSTs aware of quality criteria that should be included in assessment of SSA. We conclude that it is important to include training on assessing SSA in teacher education and that PASM could be a valuable tool for this purpose.

Education has responded to global Sustainable Development (SD) goals by drawing on a range of issue-related, context-based, and cross-curricular approaches to teaching SD. This paper aims to examine how teachers describe the content in SD and how they justify this content concerning their teaching practice. The Pedagogical Content Knowledge (PCK) framework, with its reflective tool Content Representation (CoRe), was used in combination with semi-structured interviews to capture 18 Swedish upper-secondary science teachers’ reflections. The results indicate four themes of content that the teachers emphasise: energy and global warming, ecosystem services and biodiversity, presence of harmful substances and materials in nature, and imbalance of natural substances in nature. The teachers justified these content themes in terms of the importance of students’ gaining different perspectives (local, global, ecological, social, and economic), belief in the future, action competence, and general scientific education. The paper contributes to sustainability education research, as it focuses on teaching sustainability in the light of the PCK framework. Also, it can support and inspire teachers when they decide what content to include when teaching SD.

In earlier studies, it has been argued that drama has the potential to stimulate learning in science. However, it is not widely used, one reason being that science teachers are not familiar with this instructional strategy. In this study, it was investigated how pre-service teachers in science developed dramas related to content in a biology course. The research question included how the pre-service teachers reflected on drama as an instructional strategy to stimulate conceptual understanding about cells and cell processes, both for themselves and for their future students. Ten pre-service teachers participated, all in their first year of studies to become teachers at secondary school. Data were collected in the form of student reports and video-recordings, showing the dramas they had created served as complements confirming the reports. The reports were analysed based on the tool Content Representations. The results showed that despite the fact that the pre-service teachers previously had never experienced drama in their science education, and that they identified critical aspects of using drama in science, they were positive about using drama in science education. Some of the pre-service teachers also argued that the use of drama helped them in their own understanding of cell processes.

This article describes the development and testing of a novel, water-cooled, active optic mirror system (called "REAL: Resistive Element Adjustable Length") that combines cooling with applied auxiliary heating, tailored to the spatial distribution of the thermal load generated by the incident beam. This technique is theoretically capable of sub-nanometer surface figure error control even at high power density. Tests conducted in an optical metrology laboratory and at synchrotron X-ray beamlines showed the ability to maintain the mirror profile to the level needed for the next generation storage rings and FEL mirrors.

Background: Assessing and managing pain in newborns is important for normal development and reduction of morbidity. Aim: To assess whether skin conductance measurements (SCM) can be used as an objective method for measuring procedural pain during screening for retinopathy of prematurity (ROP) in preterm infants and to identify painful components of the examination. Methods: 65 separate SCM were performed in 33 infants born at

An ongoing collaboration among four US Department of Energy (DOE) National Laboratories has demonstrated key technology prototypes and software modeling tools required for new high-coherent flux beamline optical systems. New free electron laser (FEL) and diffraction-limited storage ring (DLSR) light sources demand wavefront preservation from source to sample to achieve and maintain optimal performance. Fine wavefront control was achieved using a novel, roomtemperature cooled mirror system called REAL (resistive element adjustable length) that combines cooling with applied, spatially variable auxiliary heating. Single-grating shearing interferometry (also called Talbot interferometry) and Hartmann wavefront sensors were developed and used for optical characterization and alignment on several beamlines, across a range of photon energies. Demonstrations of non-invasive hard x-ray wavefront sensing were performed using a thin diamond single-crystal as a beamsplitter.

"A third space" can be unlocked through collaborative efforts between out-of-school organisations (like museums) and schools. By bridging museum and school contexts, blurring boundaries between disciplines and shifting between multiple perspectives on a subject, a "third space," can contribute to meaningful science education. However, resources that support collaboration between museum educators and teachers are required. The educational design of a "third space" between museums and schools can enable "an experience" informed by context-based, interdisciplinary, and value-centred teaching strategies. This study conceptualises and validates the "Alma-Löv-Programme" ("ALP"), a museum resource designed to support students' interdisciplinary, and value-centred learning in a "third space." It applies an art-based teaching strategy that encourages student groups to address science issues depicted by contemporary art. Comparison of the "Alma-Löv-Programme" design guidelines to the design instantiations of the established "Framework for Museum Practice" showed that they are largely consistent. However, noted distinctions indicate several factors that may be important for preparation and exploration of a "third space." The findings can inform the design of activities and programmes by educators in the out-of-school sector.

Background: Previous studies have investigated effects of out-of-school STEM activities aimed at stimulating children's interest in science with positive results. However, research has not discussed the reasons why such activities are successful. Purpose: In this study, we address this gap by investigating which factors children themselves identified as interesting when they visited events at an out-of-school activity named The Children's University. Sample: Children aged 8-12 participated in the study. Altogether, there were 353 children involved in the data collection. Design and methods: A mixed method design was used, including a questionnaire and semi-structured interviews in which children's self-reported experiences were collected. Likert scale questions in the questionnaire were analysed based on descriptive statistics. The open-ended questions and data from the interviews were categorized by content analysis and analytically interpreted through 'the Ecological framework for understanding learning across places and pursuits'. Results: The children were positive about their visit, and these utterances could mainly be related to the development of the individuals' interest and knowledge according to the Ecological framework. We identified two new factors influencing student's interest in STEM in out-of-school activities: appreciating the spectacular and learning; verifying two factors of importance previously suggested in the literature: appreciating the content and the learning environment. Conclusions: The study highlights the specific factors the children actually appreciated from their visits to out-of-school activities, which could be of interest for stakeholders arranging different kinds of STEM events promoting informal learning. The content in the activities is important as well as spectacular features. To have the opportunity to learn something new in an environment that is conducive to learning is also of importance for children.

Background: There is a shortage of people in the STEM sector, and it has been argued that more needs to be done, especially to attract girls. Furthermore, there is a need to develop twenty-first-century skills. No studies seem to have explored the combination of activities in makerspaces and the use of drama to stimulate interest in STEM and development of 21st century skills. Purpose: This study focused on a project with a unique combination of makerspace activities and the use of drama. The research questions investigated the outcomes that could be identified from combining drama and activities in a makerspace, with regard to the development of interest in STEM and twenty-first-century skills. Sample: Ten girls aged 7-11 years participated. A project leader, a drama teacher and three female engineering students supported the activities. Design and methods: The project lasted 3 months. Data were collected in the form of interviews and observations with video-recordings and field-notes, as well as documentation of props made by the girls. Analyses were conducted using thematic coding and discussed through the lens of Activity Theory. Results: The results showed that some of the girls developed an interest in science and technology. The girls also developed twenty-first-century skills, in terms of creativity, problem-solving and cooperation. Conclusions: Positive outcomes were found in this project, blending drama and making in a makerspace learning environment. Future studies could investigate how other skills and knowledge in different STEM subjects can be developed in similar projects.

Background: Although science and technology are viewed as closely related subjects, they are rarely combined in preschools. Purpose: This article investigates preschool teachers' perspectives on integrating digital tools when teaching science, asking how and why they use digital tools, and examining the affordances they experience and obstacles they encounter when incorporating digital tools. Sample: Eighteen Swedish preschool teachers volunteered to participate in the study. Design and method: Data were collected through group interviews and analyzed using a thematic approach, together with the Technological Pedagogical Content Knowledge (TPACK) framework, to obtain a more detailed picture of the teachers' experiences. Results: Most of the participants were positive about using digital tools when teaching children science, and they emphasized the need for training on how to use the tools themselves. The preschool teachers viewed digital tools as good complements to other tools when teaching science and to find information about science facts. Moreover, there were generic reasons for using digital tools, such as to stimulate critical reflections among the children, to document activities and to create stimulating learning environments. However, one group of preschool teachers struggled with integrating digital tools when teaching science. Discussion: Digitalization in preschools and the rest of society is developing. The preschool teachers found possibilities and challenges in using digital tools when teaching children science. Still, future studies are needed to investigate how this will develop. In addition to the results, we found that TPACK served as a useful framework for analyzing and discussing our results. Therefore, we recommend TPACK when analyzing and discussing the use of digital tools in future preschool studies. [ABSTRACT FROM AUTHOR]

The aim of this case study was to investigate what happens in science classrooms when teaching is almost entirely based on the use of digital technology. Two secondary school science teachers participated, together with their seventh grade classes. Data were collected through eight observation sessions (altogether about 9.5 h) and 9 h of interviews with the teachers. For analysis, a modified version of the Technological Pedagogical and Content Knowledge framework was used. The results showed the science teachers' general approach in the classroom and revealed that they were self-confident in using digital technology, and utilised predetermined digital study material and, when it was felt necessary, supplemental materials. The teachers were positive about using digital technology since they thought it motivated their students and made assessment easier. The teachers claimed that digital technology had improved their teaching, providing more breadth because of access to varied digital tools; teaching had also become more individualised. Few differences were identified between different lessons, whether in physics, chemistry or biology, and unfortunately the identified relationship between the use of digital technology and content knowledge was limited. The teachers also reflected on the challenges they faced, especially in supporting low-achieving students and effectively using inquiry-based teaching through digital technology. Despite some acknowledged limitations, the study enhances our knowledge about how the Technological Pedagogical Content Knowledge framework can be used as an analytical tool in authentic teaching, with specific contexts and, above all, when education is largely based on the comprehensive use of digital technology rather than its occasional integration.

In this study children's learning of the concept, stability, during some building activities were investigated. It was also examined how a story can create meaning, having the children build for some animals in the story. Two preschool teachers and 10 children participated. Data consisted of video-recordings from activities with the children and was analysed through thematic coding. The findings showed that the children enjoyed to build and showed an understanding of how to build stable constructions, however without using the word stable. There were connections to the story and new stories were also made by the children during building activities.

In recent years, the curricula reforms at the levels of preschool and primary school in Sweden have caused new demands on the teachers. In particular, numerous teachers lack the educational training in science subjects. Therefore, this study aims to investigate teachers' self-efficacy and needs in relation to science teaching. A total of 71 teachers, divided into three groups of preschool, 1-3 grades and 4-6 grades, were invited to join this pilot study. From the EU FP7 project, PROFILES, a Likert scale questionnaire (with scores from 1 to 3 to represent "strongly disagree," "agree" to "strongly agree," and "I don't know" was scored 0) was used and revised for the data collection in this pilot study. The results showed that the participating teachers had relatively high self-efficacy and no significant differences were found among the three groups of teachers. However, even though the teachers had high self-efficacy, the needs of further education were expressed by the teachers to a large extent. In particular, the group of preschool teachers addressed the need for more content knowledge (CK) in physics and chemistry (>41%). In terms of the groups of 1-3 and 4-6 grades teachers, the needs relating to scientific literacy were revealed, with a focus on engaging students in socio-scientific problems (52%, 56%) and assessment (44%, 61%). The implication of this study is discussed in the hope to contribute to teachers' professional development for both pre- and in-service teachers in science education.

Earlier studies have discussed the usefulness of storytelling and hands-on activities when teaching young children science. However, few studies have investigated the use of the two methods in combination. This study reports on five pre-school teachers' experience of combining storytelling and hands-on activities in teaching science and their perceived effects of the combination. Interviews with the teachers and a supplementary observation served as the data material, which was transformed into narratives and member-checked by the participating teachers. Some found the combination of methods important while others argued that hands-on activities were effective without the use of stories. The teachers' enjoyment in adopting the combinatory method and their appreciation of the stories also made a difference.

Based on a sociocultural perspective, this study explores the outcome of using a model that combines storytelling and drama to teach young children science. The research question is: "How is children's learning affected when using a combination of storytelling and drama to explain a complex scientific concept?" Two preschools and one primary school were visited. Altogether 25 children aged 4-8 years participated. Each group listened to a story about "The Rhinovirus Rita." No pictures were shown during storytelling. After the story was told, a play was performed with the children, telling the same story they just had listened to, and the children also made drawings. At a second visit to the schools, each child was interviewed individually and their drawings were used to stimulate recall. The results show that many of the children had learnt the names of immune system cells and how they work when someone has a cold. Moreover, they had also learnt that viruses cause colds. There were also a small number of children who did not show any learning development related to this specific content. Still, we argue that the combination of storytelling and drama is an instructional strategy that has positive potential when it comes to teaching children science.

O conceito de imagem corporal está baseado a partir de um construto multidimensional, formado das representações sobre o tamanho e aparência do corpo. Objetivou-se a verificar de forma sistematizada a literatura estudos que apresentassem a relação entre satisfação da imagem corporal e variáveis sexuais. Os resultados demonstraram que a área que estuda a percepção da imagem corporal em bailarinos ainda não percebeu a importância de outras dimensões como identidade de gênero, orientação sexual e os esquemas de gênero do autoconceito, que podem ter maior impacto do que apenas o critério sexo biológico. O sexo biológico ainda é a principal variável de controle na comparação nos estudos entre os bailarinos, sendo urgente a necessidade de outras dimensões da identidade a serem incorporadas nos próximos estudos, como as citadas acima, para ampliar a capacidade de explicarmos a satisfação corporal humana.

Resumo Objetivou-se avaliar as propriedades psicométricas da QOE para o contexto esportivo brasileiro, em termos de validade de construto, validade discriminante e confiabilidade. Participaram do estudo 387 atletas e 480 universitários. O QOE carregou um único fator e apresentou excelente capacidade discriminante entre os participantes atletas e não atletas. Conclui-se que o QOE mostrou um bom desempenho psicométrico quando estudado a partir de uma amostra de atletas brasileiros de diferentes modalidades.

Background: The European Union asks for renewed pedagogies in schools according to teaching strategies and necessary competences for the twenty-first century, instead of the often-used transmissive pedagogies. The national Swedish competition in science and technology for grade eight, The Technology Eight, provides an opportunity for teachers to work with instructional strategies in line with suggested pedagogies. Purpose: To investigate teachers' and principals' reflections on the competition in schools. Sample: Seventeen secondary school teachers and three principals from districts in the south-western part of Sweden participated in the study. All teachers had long experience of the competition, and their classes had reached at least the regional finals during the last year. Design and methods: Semi-structured interviews were recorded, transcribed verbatim, and then analysed using content analysis. Focus was put on why the teachers decided to participate, how the teachers integrated the competition in their education and roles of the principals. Results: There were various reasons for participating in the competition. Teachers reported development of twenty-first-century skills such as better cooperation between the students. They also noticed an increased interest in science and technology and how learning in the subjects was stimulated. Furthermore, the teachers found participation in the competition to be positive for them too. They integrated the competition in ordinary education and gained teaching ideas as well as found connections to the curriculum. Participating in the competition seemed to be a tradition in most of the schools. The principals' role was to facilitate the organisation around the competition and to provide social support. Conclusions: Participation in a school competition was considered as an instructional strategy with several positive outcomes. Use of this strategy can be supported by earlier suggestions to use pedagogies that are opposite to transmissive methods, enhancing students' development of important skills for the future.

Nos jogos esportivos coletivos os atletas são divididos de acordo com o ano de nascimento, como consequência desse processo tem-se o efeito da idade relativa (EIR), que representa a possível vantagem obtida pelo atleta agrupado em um escalonamento etário dentro do mesmo ano de seleção de uma categoria. O objetivo desse estudo foi verificar o EIR na seleção de atletas em diferentes Jogos Esportivos Coletivos de acordo com o sexo, em clubes e equipes esportivas do Estado de Santa Catarina. Participaram do estudo 360 atletas, sendo 217 (60,3%) do sexo masculino, com média de idade de 20,9 (±5,23) anos, das modalidades de futebol de campo, futsal, handebol e basquetebol. Os indicadores sociodemográficos, econômicos e esportivos foram obtidos por meio de um questionário auto aplicado. Para verificar a idade relativa utilizou-se o calendário anual, dividindo o ano em quartis. A análise dos resultados demonstrou um maior percentual de atletas nascidos no primeiro quartil, entretanto o EIR foi verificado apenas nos atletas de futebol de campo, sendo que para os atletas de basquetebol observou-se uma tendência ao aparecimento. Além disso, verificou-se uma maior concentração de atletas do sexo masculino nascidos no primeiro semestre, enquanto que para o sexo feminino essa associação não foi significativa. Em conclusão, observa-se que o nível de competitividade do esporte pode ser um fator importante no favorecimento do EIR em esportes categorizados pela idade. Além disso, maior cautela e atenção são necessários para atletas do sexo masculino, especialmente em esportes com níveis de concorrências mais elevado. ABSTRACT The effect of relative age in the selection of athletes in collective sports games The objective of this study was to verify the EIR in the selection of athletes in different Collective Sports Games according to the sex, in clubs and sports teams of the State of Santa Catarina. A total of 360 athletes participated in the study, of which 217 (60.3%) were males, with a mean age of 20.9 (± 5.23) years, of field, futsal, handball and basketball modalities. Socio-demographic, economic and sports indicators were obtained through a self-administered questionnaire. To verify the relative age, the annual calendar was used, dividing the year into quartiles. The analysis of the results howed a higher percentage of athletes born in the first quartile, however the EIR was verified only in the field soccer athletes, and for the athletes of basketball was observed a tendency to appear. There was a higher concentration of male athletes born in the first semester, in females this association was not significant. It is observed that th elevel of competitiveness of the sport can bean important factor in the favoring of the EIR in sports categorized by age. In addition, greater caution and attention are needed for male athletes, especially in sports with higher competition levels.

Social support is an important predictor for the maintenance of physical activity in adolescence. Thus, the social-ecological approach values the impact of individuals or groups interaction with available resources in the social environment for adopting an active lifestyle. This study analyzes social support from family and friends for adolescents to practice physical activity. Guided by the Social-Ecological Theory, an observational cross-sectional structural equations modeling was applied to 2,710 Brazilians adolescents aged from 14 to 18 years. We identified that the greater the social support from friends (β = 0.30; RMSEA = 0.065; CFI = 0.953; TLI = 0.922; SRMR = 0.048) and family, the greater the adolescents physical activity (β = 0.27; RMSEA = 0.015; CFI = 0.997; TLI = 0.995; SRMR = 0.013). However, support from both sources indicated no adequate adjustment values in the same study model. Our findings suggest that adolescents who perceive social support from family members or friends practice more physical activity, confirming that social support is important for physical activity promotion.

Studies have shown that there is a need for pedagogical content knowledge among science teachers. This study investigates two primary teachers and their objectives in choosing inquiry- and context-based instructional strategies as well as the relation between the choice of instructional strategies and the teachers' knowledge about of students' understanding and intended learning outcomes. Content representations created by the teachers and students' experiences of the enacted teaching served as foundations for the teachers' reflections during interviews. Data from the interviews were analyzed in terms of the intended, enacted, and experienced purposes of the teaching and, finally, as the relation between intended, enacted, and experienced purposes. Students' experiences of the teaching were captured through a questionnaire, which was analyzed inductively, using content analysis. The results show that the teachers' intended teaching objectives were that students would learn about water. During the enacted teaching, it seemed as if the inquiry process was in focus and this was also how many of the students experienced the objectives of the activities. There was a gap between the intended and experienced objectives. Hardly any relation was found between the teachers' choice of instructional strategies and their knowledge about students' understanding, with the exception that the teacher who also added drama wanted to support her students' understanding of the states of water.