With the nationwide closures of educational institutions in the United States due to the novel coronavirus disease 2019 (COVID-19), many schools transitioned from face-to-face instruction to eLearning formats at the beginning of the pandemic, while many students and their families self-isolated at home. The literature has revealed that self-isolation has a negative effect on adolescents' psychological outcomes, and high social support buffers against these outcomes. The purpose of the present research was to examine the moderating effect of perceived teacher support in the relationships between self-isolation during the beginning of the pandemic and negative health outcomes. Teacher support, self-isolation during the beginning of the COVID-19 pandemic, and health outcomes (i.e., suicidal ideation, nonsuicidal self-harm, subjective health complaints, depression) were measured in mid-April 2020 and health outcomes were measured again in late-May 2020. Participants were 467 7th and 8th graders (51% female; M-age = 13.47; ages range from 12 to 15 years old) from the suburbs of a large Midwestern city in the United States. The findings revealed that greater perceived teacher support buffered against the negative outcomes associated with self-isolation during the beginning of the COVID-19 pandemic and lower perceived teacher support strengthened these relationships. The results might inform policy development regarding strategies to improve health outcomes for adolescents during the COVID-19 crisis and future pandemics. <br /> Impact and Implications Findings revealed that greater perceived teacher support reduced the negative health outcomes associated with self-isolation during the beginning of the COVID-19 pandemic among adolescents, whereas lower perceived teacher support increased these relationships. The results provide a better understanding of the role of schools, specifically teachers, for mitigating societal issues. Furthermore, the findings inform the need to ensure that schools have adequate resources to support their students, as teachers are instrumental for improving students' outcomes.

Introduction The aim of this study is to develop a new measure of victimization and perpetration of two frequent forms of image-based sexual abuse, namely sextortion (i.e., the threat of distributing sexual images to pressure the victim into doing something) and nonconsensual sexting (i.e., distributing sexual images of someone without the consent of the victim). Additional aims were to analyze the prevalence of these forms of victimization and perpetration and to examine their temporal stability over a 1-year period. Methods The sample was made up of 1820 Spanish adolescents (mean age = 13.38, SD = 1.42; 929 girls, 878 boys, 3 nonbinary, and 10 did not indicate gender) who completed self-report instruments on image-based sexual abuse and related variables (e.g., cyberbullying victimization). Results Confirmatory factor analysis supported a structure composed of the four hypothesized factors: sextortion victimization and perpetration, and nonconsensual sexting victimization and perpetration. Higher sexting, cyberbullying victimization, and symptoms of depression and anxiety had stronger associations with image-based sexual victimization than with perpetration, which showed evidence of concurrent validity. Prevalence was 2.6% and 0.7% for sextortion victimization and perpetration, respectively, and 3.4% and 4.9% for nonconsensual sexting victimization and perpetration, respectively. Temporal stability over 1 year was .26 for sextortion victimization, .19 for nonconsensual sexting victimization, .33 for nonconsensual sexting perpetration (all ps < .001), and nonsignificant for sextortion perpetration. The stability of nonconsensual sexting victimization was significantly higher for girls compared to boys, whereas nonconsensual sexting perpetration was more stable over 1 year for boys. Conclusions Future studies must advance the analysis of the predictors and consequences of image-based sexual abuse among adolescents to better prevent this problem. Prevalence of sextortion and nonconsensual sexting is not negligible, and these problems should be particularly addressed in prevention programs.

Optics is a core field in the curricula of secondary physics education. In this study, we present the development and validation of a test instrument in the field of optics, the ray optics in converging lenses concept inventory (ROC-CI). It was developed for and validated with middle school students, but can also be adapted for the use in higher levels of physics education. The ROC-CI can be used as a formative or a summative assessment of students' conceptual understanding of image formation by converging lenses, assessing the following: (i) the overall understanding of fundamental concepts related to converging lenses, (ii) the understanding of specific concepts, and (iii) students' propensity for difficulties within this topic. The initial ROC-CI consists of 16 multiple-choice items; however, one item was removed based on various quality checks. We validated the ROC-CI thoroughly with distractor analyses, classical test theory, item response theory, structural analyses, and analyses of students' total scores at different measurement points as quantitative approaches, as well as student interviews and an expert survey as qualitative approaches. The quantitative analyses are mostly based on a dataset of N 1/4 318 middle school students who took the ROC-CI as a post-test. The student interviews were conducted with seven middle school students after they were taught the concepts of converging lenses. The expert survey included five experts who evaluated both individual items and the test as a whole. The analyses showed good to excellent results for the test instrument, corroborating the 15-item ROC-CI's validity and its compliance with the three foci outlined above.

Instructional videos are widely used to study teachers' professional vision. A new technological development in video research is mobile eye-tracking (MET). It has the potential to provide fine-grained insights into teachers' professional vision in action, but has yet been scarcely employed. We addressed this research gap by using MET video feedback to examine how expert and novice teachers differed in their noticing and weighing of alternative teaching strategies. Expert and novice teachers' lessons were recorded with MET devices. Then, they commented on what they observe while watching their own teaching videos. Using a mixed methods approach, we found that expert and novice teachers did not differ in the number of classroom events they noticed and alternative teaching strategies they mentioned. However, novice teachers were more critical of their own teaching than expert teachers, particularly when they considered alternative teaching strategies. Practical implications for the field of teacher education are discussed.