Teaching physics: Students’ attitudes towards different learning activities

The decline in the popularity of physics over the period of secondary schooling and its consequent low uptake at A‐level and beyond continues to cause concern on educational and economic grounds. The aim of this study is to explore whether physics might be made more attractive to students by employing an extended range of classroom and laboratory activities to teach it. Specifically, the study scores the popularity of a range of activities, students’ perceptions about how often these activities are used to teach physics, and whether students consider them educationally useful. Students appear to think in terms of written activities, passive activities, social activities and constructive activities. Written activities are relatively unpopular and seen as educationally less effective, but students perceived them as used frequently. Social activities such as group work are more popular. The most popular activities are constructive activities, such as doing experiments; these are seen as educationally useful, but are perceived as being used less often than other activities. While there are legitimate limitations on the types of activities that can be used, these findings add to our appreciation of which teaching activities students like and value.     

Assessing Student Writing on Tablets

There is increasing expectation that schools should be able to use tablets for a range of instructional and assessment purposes. This article considers the comparability of student writing on tablets and laptops to ensure that writing assessment is conducted in a way that is fair to all students. Data were collected from a sample of 826 students from Virginia and South Dakota at 2 grade levels. Each student was provided with a laptop, a tablet, or a tablet with an external keyboard and asked to respond to a grade-level-appropriate essay prompt. Results indicated no difference in the essay score or surface-level essay features across study conditions. However, the relatively short length of essays written, the fact that reference materials were not required to respond to the essay prompts, and the general motivational level of student participants were likely contributing factors to the observed outcomes.     

Lunar spacecraft powered descent control using higher-order sliding mode techniques

Robust performance of a flight control system in the presence of parametric uncertainty and external disturbances is of paramount importance to a successful planetary exploration program. The present research is concerned with the design of an autopilot that uses high-order sliding mode (HOSM) control principles so as to enhance the robustness properties of a lunar landing vehicle during the approach phase of powered descent. The design technique is applied to a high-fidelity simulation of the Apollo Lunar Module (LM). The design efficiently utilizes both the reaction control system (RCS) actuators and the severely rate-limited gimbal drive actuator (GDA) to effect smooth detection and compensation of sensed angular acceleration disturbances about the vehicle's control axes. The integration of a HOSM control law for the RCS effectors with a HOSM disturbance observer is shown to provide performance comparable to that of the heritage autopilot and may also avoid some difficulties encountered in the Apollo flights. Performance is maintained with the controller implemented in discrete time in the presence of a realistic vehicle and sensor model, demonstrating a unique application of sliding mode control to a complex aerospace system.     

Children's Group Nous: Understanding and Applying Peer Exclusion Within and Between Groups

In Study 1, 167 English children aged 6–8 or 9–11 evaluated peer English or French soccer fans that were loyal or partially disloyal. In Study 2, 149 children aged 5–11 made judgments about generic inclusion norms between and within competitive groups. In both studies, children's understanding of intergroup inclusion/exclusion norms (group nous) was predicted by theory of social mind (a social perspective taking measure) but not multiple classification skill. In Study 2, the number of groups children belonged to (an index of peer group experience) also predicted group nous. Supporting the developmental subjective group dynamics model ( D. Abrams, A. Rutland, & L. Cameron, 2003 ), children's experience and perspective taking help them make sense of inter- and intragroup inclusion and exclusion.     

The Changing Landscape of Early Childhood Education: Implications for Policy and Practice

Early childhood education is changing rapidly due to the dynamic nature of positive and negative trends affecting the profession. In this article, the changing landscape of early childhood education is discussed and analyzed. Both the positive and negative forces contributing to the changing landscape are examined. The focus of this discussion includes changing demographics, changes in early childhood curriculum and instruction, increased focus on accountability, advances in research that inform early childhood education, influences affecting teacher preparation and professional development, and global trends affecting early education and care. We relate these trends to the need for holistic systems-thinking, integrated curricula, child-centered pedagogical standards, deeper commitment to social justice and a corresponding moral vision capable of inspiring educational policy, practice and research in the midst of a competitive global economy and the commodification of early childhood programs and curricula. By discussing practical examples and research findings to illustrate current positive and negative trends, this paper serves as a meaningful resource for all stakeholders. Taking recent dynamics into account, we provide a vision for evaluating change and analyzing major trends. Both implications and responses to the changes in the early childhood landscape are discussed.     

How performance assessment for leaders (PAL) influences preparation program quality and effectiveness

The Performance Assessment for Leaders (PAL) is a four-task evaluation system designed to improve the quality of initial school leaders in Massachusetts by evaluating candidate readiness using a rigorous, standard assessment system. By design, it is signalling leadership quality expectations to preparation programmes. Through two years of survey research with leadership preparation faculty (n?=?12) and candidates (n?=?53) who completed PAL, we explored faculty understanding the PAL assessment, assessment alignment task to programme content, candidate preparedness, and impact on programmes. Results show that faculty used PAL to improve their preparation programmes and provide high-quality learning experiences for candidates.     

Effect of movement velocity during resistance training on muscle-specific hypertrophy: A systematic review

Currently, it is unclear whether manipulation of movement velocity during resistance exercise has an effect on hypertrophy of specific muscles. The purpose of this systematic review of literature was to investigate the effect of movement velocity during resistance training on muscle hypertrophy. Five electronic databases were searched using terms related to movement velocity and resistance training. Inclusion criteria were randomised and non-randomised comparative studies; published in English; included healthy adults; used dynamic resistance exercise interventions directly comparing fast training to slower movement velocity training; matched in prescribed intensity and volume; duration ≥4 weeks; and measured muscle hypertrophy. A total of six studies were included involving 119 untrained participants. Hypertrophy of the quadriceps was examined in five studies and of the biceps brachii in two studies. Three studies found significantly greater increases in hypertrophy of the quadriceps for moderate-slow compared to fast training. For the remaining studies examining the quadriceps, significant within-group increase in hypertrophy was found for only moderate-slow training in one study and for only fast training in the other study. The two studies that examined hypertrophy of the biceps brachii found greater increases for fast compared to moderate-slow training. Caution is required when interpreting the findings from this review due to the low number of studies, hence insufficient data. Future longitudinal randomised controlled studies in cohorts of healthy adults are required to confirm and extend our findings.