Accuracy,intra- and inter-unit reliability,and comparison between GPS and UWB-based position-tracking systems used for time–motion analyses in soccer

There is interest in the accuracy and inter-unit reliability of position-tracking systems to monitor players. Research into this technology, although relatively recent, has grown exponentially in the last years, and it is difficult to find professional team sport that does not use Global Positioning System (GPS) technology at least. The aim of this study is to know the accuracy of both GPS-based and Ultra Wide Band (UWB)-based systems on a soccer field and their inter- and intra-unit reliability. A secondary aim is to compare them for practical applications in sport science. Following institutional ethical approval and familiarization, 10 healthy and well-trained former soccer players (20?±?1.6 years, 1.76?±?0.08?cm, and 69.5?±?9.8?kg) performed three course tests: (i) linear course, (ii) circular course, and (iii) a zig–zag course, all using UWB and GPS technologies. The average speed and distance covered were compared with timing gates and the real distance as references. The UWB technology showed better accuracy (bias: 0.57–5.85%), test–retest reliability (%TEM: 1.19), and inter-unit reliability (bias: 0.18) in determining distance covered than the GPS technology (bias: 0.69–6.05%; %TEM: 1.47; bias: 0.25) overall. Also, UWB showed better results (bias: 0.09; ICC: 0.979; bias: 0.01) for mean velocity measurement than GPS (bias: 0.18; ICC: 0.951; bias: 0.03).     

Embracing equity and excellence while constructing science teacher identities in urban schools: Voices of new Teachers of Color

We explored how new Teachers of Color grappled with equity and excellence as they were constructing science teacher identities while learning to teach in a teacher education program committed to equity, justice, and excellence, and eventually teaching in urban schools where inequities and injustices persist. The theoretical framing, compiled from various bodies of literature, weaved together what we consider as essential parts of teacher identity construction and provided a lens with which to examine how conceptions of equity and excellence that the study participants were constructing meshed with their multiple identities, considerations on legitimate knowledge production, and dialectical relationships with which they grappled. Using transcendental phenomenology, we learned from and with three Black and Latinx teachers and their narratives. The teachers intertwined similarly and differently their evolving conceptions of equity and excellence into their evolving science teacher identities as they engaged in forms of contentious local practice and reflected on their experiences as science Teachers of Color teaching predominately Students of Color. Their multiple identities were meshed with histories of larger institutions—science, schooling, and society—and together these were shaping their conceptions of equity and excellence. The intermingling of equity and excellence, which was guiding the curricular and instructional decisions they were making in their classrooms, was also linked to what they considered as legitimate knowledge production in science classes and what counted as knowledge that their students needed to know at different times. The various dilemmas defined by opposing poles with which they were grappling also functioned as scales on which their coordinated equity-excellence unit of meaning was forming. Based on the study, we offer insights into practices that science teacher educators may consider as they prepare new teachers, and work with practicing teachers, to embrace and coordinate equity and excellence in their ever-developing science teacher identities.     

Immersive VR for Organic Chemistry: Impacts on Performance and Grades for First-Generation and Continuing-Generation University Students

Innovative Higher Education - Rapid advances in the quality and accessibility of immersive virtual reality (IVR) have brought about intense interest in applications of the technology within higher...     

A change of perspective – Exploring Mexican primary and secondary school students’ perceptions of their teachers differentiated instructional practice

With the increasing student diversity, the establishment of inclusive classrooms has become a top concern of policy-makers worldwide urging teachers to differentiate their instruction according to students’ individual learning needs. As the implementation of differentiated instruction (DI) relies mainly on teachers, previous research has mostly focused on examining teachers’ perspectives on their use of differentiation. In contrast, far less attention has been paid to explore students’ perspectives about their experiences in inclusive classrooms. Therefore, this study aims at examining students’ experiences of their teachers’ actual DI practice. Moreover, this study sets the spotlight on Mexico, a country that has faced changes with a recent proposed educational model. Results from a mixed analysis of variance revealed that students do in fact perceive that their teachers implement DI practices. It appears that both primary and secondary school teachers implement more frequent variants of mastery learning as well as tutoring systems as a means to differentiate their instruction. Implications of the results, as well as further lines of research, are discussed.     

FACILITATORS OF AND BARRIERS TO MODEL SCHOOL PSYCHOLOGICAL SERVICES

This study examined facilitators of and barriers to comprehensive and integrated services. A national sample of 267 full‐time practicing school psychologists who were Regular Members or Early Career Members of the National Association of School Psychologists participated. We administered a survey to participants that measured the extent to which they engaged in comprehensive and integrated services and the top facilitators of and barriers to those services using web‐based survey procedures. Results indicated that the majority of facilitators identified (Personal Attributes, Stakeholder Involvement, Resources and Support, School‐Specific Variables, Contextual Variables) predicted greater levels of comprehensive and integrated service delivery. Identified barriers—which often reflected the opposite condition of the facilitators—predicted lower levels of service delivery in some instances; however, they predicted services less often than did facilitators. Implications for research focused on better understanding factors that impact service delivery and on processes for facilitating increased comprehensive and integrated service delivery are discussed. Additionally, implications for practice include the assessment of facilitators and barriers, the use of data to plan for the delivery of comprehensive and integrated services, and advocacy for systems change.     

Learning environments with technological resources: a look at their contribution to student performance in Latin American elementary schools

Research shows that computer access and use has a positive effect on the performance reached by Latin American schoolchildren in sixth grade. This is supported by Multilevel models of 4 and 3 levels with data from the Second Regional Comparative and Explanatory Study, developed by UNESCO (2008) in 16 countries and analyzing around 3,000 schools, some 92,000 sixth grade students and 3,900 teachers. The results: Barely one-third of Latin American sixth graders have a computer in their home, and schools where these children attend are unable to reverse this. Furthermore, there is a marked deficit of computers at home and schools in rural areas. Data shows that school performance in reading and math increases significantly among those students that have a computer in their home, an increase that is greater among those students that have at their disposal >10 computers at school. In turn, increased use, both by pupils and teachers, improves school performance in both disciplines once the following variables are controlled: socio-economic level, family culture, gender, mother tongue and number of pre-school years.