ROLE OF SCHOOL SCHEDULE,AGE, AND PARENTAL SOCIOECONOMIC STATUS ON SLEEP DURATION AND SLEEPINESS OF PARISIAN CHILDREN

The aim of the study was to assess the duration and quality of sleep of prepubertal (Tanner Scale level 1) physically and mentally healthy children as a function of school schedule (4 versus 4.5 days per week), age and grade (median age of 9.5 years for 4th grade versus median age of 10.5 years for 5th grade), school district (wealthy versus nonwealthy) in Paris, France, and parental socioeconomic status (high, medium, or low). We studied 51 girl and 44 boy volunteer pupils with written parental consent. The study lasted 2 weeks during the month of March. During the first study week, the children attended school 4.5 days, and during the second week, they attended school only 4 days without difference in the length of the school day. A sleep log was used to ascertain time of lights off for sleep and lights on at awakening, nighttime sleep duration, and self-rated sleep quality. A visual analog scale (VAS) was also used by pupils to self-rate the level of perceived sleepiness at four specific times of the school day. Conventional statistical methods (e.g., t and χ²tests) were used to examine differences in mean values. Sleep duration, self-rated sleepiness, and subjective sleep quality were comparable (P >. 05) by gender, school schedule, school district, and parental socioeconomic status. Overall, the sleep of this sample of Parisian children around 10 years of age was rather stable in its duration and timing, suggesting flexibility to adjust to the different school schedules. (Chronobiology International, 18 (6), 1005–1017, 2001)     

Social Effects of a Dog's Presence on Children with Disabilities

ABSTRACT

Productive and positive interactions between dogs and humans have been documented in studies using dogs trained as companion animals and as assistants for people with disabilities. In this study, the effects of the presence of a dog on social interactions between three 5–9-year-old children with developmental disabilities and their teacher at an elementary school were analyzed. A single-case experimental design with repeated measures and with replicated effects across participants was employed to assess changes in interactions from baseline to an intervention condition. During baseline, interactions were assessed in the social environment of a room adjacent to the classroom, which had a toy dog and other play materials, during time with the teacher. The experimental change introduced sequentially and systematically across the participants was the additional presence of an obedience-trained dog, a German Shepherd/Labrador Retriever cross. Interactions between the children and their teacher were examined during morning sessions using reliable direct observation interval recording procedures. All participants demonstrated an increase in overall positive initiated behaviors (verbal and non-verbal) toward both the teacher and the dog. The children also showed an overall decrease in negative initiated behaviors. In addition, observational ratings showed positive generalization of improved social responsiveness by the children in their classroom following the completion of the experimental sessions. This study supports the position that children with developmental disabilities benefit from the use of skilled dogs as teaching assistants and therapeutic adjuncts.     

Using a board game to teach protein synthesis to high school students

The present work aimed to investigate the contribution of the board game ‘Synthesizing Proteins’ to the understanding of protein synthesis by high school students, based on the socio-interactionist theory of Vygotsky. Fifteen students (six from a public school and nine from a private school) participated in the research, which had three stages: diagnosis and pre-interview, game execution, and post-interview, with collection of written and audiovisual data. The data were organised and interpreted according to a qualitative content analysis, in which we evaluated the predominant concepts, the conceptual gains and type of interactions promoted by the game in the understanding of target themes. The results indicated that the game contributed to the improvement (or construction) of a protein synthesis model by the students, providing a symbolic representation of the process through interactions guided by the rules of the game (in the game, students played the roles of molecules, and simulated mechanisms and processes). These interactions, especially of cooperative and competitive nature, may promote a meaningful, prospective learning.     

EOV Editorial Board

Why are there only crumbs left at the bottom of the cereal box? Many factors, such as package handling, have caused the cereal pieces to break down into crumbs. This explanation is also related to the process of creating sediment from rocks. Sediment is created by weathering over millions of years, and it is deposited all over the world by erosion. The We're Gonna Crush It! activity serves as a brief introduction to sediment composition. Students learn how sediment is created by demonstrating weathering at a much quicker pace than what occurs under natural conditions. They see firsthand how weathering affects rocks by mirroring the process using cereal to make “sediment.” The students learn how to calculate grain size percentages to determine the overall composition of the sediment while becoming more aware of the organisms and organic matter that are also present. In less than 60 min, students can experience a large-scale process that generally occurs over millions of years. Several Next Generation Science Standards, Common Core Math Standards, and Ocean Literacy Standards are addressed in this activity.     

A Plethora of Fungi: Teaching a Middle School Unit on Fungi

Abstract

While fungi play a vital role in Earth's ecosystems, they are not highlighted in the Next Generation Science Standards (NGSS). This article contains a unit plan to introduce students to the fungal kingdom, characteristics of fungi, and their role as decomposers. The unit plan is written in a 5E model format and can be adjusted for any type of lesson planning format. Students explore fungi through hands-on activities, a jigsaw activity that makes use of collaborative learning, and analysis of case studies. Teachers can use this unit without a strong background in mycology, the study of fungi, or costly materials. A summative assessment is included at the end of the unit plan.     

高职院校中专学生SCL-90评定结果分析

目的:分析影响高职院校中专学生的心理健康状况的相关因素.方法:对抽取的江苏省某职业院校437名学生,用症状自评量表(SCL-90)调查,以因子分≥3筛查阳性个体进行检出率及年级差异的比较.结果:低年级学生SCL-909个因子得分均高于全国常模值,比较差异均有统计学意义(P＜0.05).心理健康阳性检出率的排序,其中排在前3位的分别为敌对、人际关系敏感以及强迫症状,它们的阳性检出率分别为6.86％、5.95％和5.03％,高于其他因子,比较差异均有统计学意义(P＜0.05).2009级学生的阳性率高于2010级,但心理健康阳性检出率年级差异无统计学意义(P＞0.05).结论:高职院校的中专学生心理健康状况不容乐观,敌对、人际关系敏感、强迫症状、抑郁、焦虑是其面临的主要心理问题,学校应该针对性的开展心理干预措施.     

Metabolic Syndrome in Overweight and Obese Japanese Children

Objective: To determine the prevalence of and sex differences related to the metabolic syndrome among obese and overweight elementary school children. Research Methods and Procedures: Subjects were 471 overweight or obese Japanese children. Children meeting at least three of the following five criteria qualified as having the metabolic syndrome: abdominal obesity, elevated blood pressure, low high‐density lipoprotein‐cholesterol levels, high triglyceride levels, and high fasting glucose levels. Fasting insulin levels were also examined. Results: Japanese obese children were found to have a significantly lower prevalence (17.7%) of the metabolic syndrome than U.S. obese adolescents (28.7%, p = 0.0014). However, Japanese overweight children had a similar incidence (8.7%) of the metabolic syndrome compared with U.S. overweight adolescents (6.8%). Hyperinsulinemia in girls and abdominal obesity in boys are characteristic features of individual metabolic syndrome factors in Japanese children. Discussion: The prevalence of the metabolic syndrome is not lower in preteen Japanese overweight children than in U.S. overweight adolescents, although it is significantly lower in Japanese obese preteen children than in U.S. obese adolescents. Primary and secondary interventions are needed for overweight preteen children in Japan.     

Practices of change in the education sector: professionals dealing with ethnic school segregation

ABSTRACT

This article looks at second-generation professionals in the education sector in Sweden, France and the Netherlands, whose parents were born in Turkey. In their stories, ethnic school segregation appears as an important topic that coincides with other inequalities in society and signals educational injustice. This so-called wicked problem is used to understand how second-generation professionals assert influence in their quest for educational change. The analysis, based on semi-structured interviews, shows that influence and change are conditional. Second-generation professionals are constrained by the structural boundaries of the sector, which seem particularly fixed because of the way in which the education sector is entangled with state policies. Simultaneously, they are aware of these boundaries, and of the nation-specific change-opportunities existing within them. Using their “in-betweenness” as second-generation social climbers, with their knowledge of the education system, they apply varying practices of change focused on moderating the negative effects of ethnic school segregation.     

Contribution of physiologists to the identification of the humoral component of immunity in the 19th century

The history of antimicrobial humoral immunity usually focuses on the works of the German school at the end of the 19th century, born in the tradition of chemistry and disinfection. Starting from an old quarrel of priority about serotherapy between Emil von Behring (1854–1917) and the French physiologists Charles Richet (1850–1935) and Jules Héricourt (1850–1938), we first confirm that the latter stated the principle of serotherapy in 1888 and put it into practice before the seminal Behring's article in 1890, observing several adverse effects of this new immunotherapy. We also find that researchers who can be considered heirs of the French school of Physiology founded by Claude Bernard (1813–1878) also investigated the field of humoral immunity in the 1870–1880s. Maurice Raynaud (1834–1881), Auguste Chauveau (1827–1917), and eventually Charles Richet applied the experimental method of Claude Bernard to the young field of microbiology, illustrating a movement called by Jacques Léonard “physiologization of the pasteurism.” However, the contribution of physiologists in this field started before Louis Pasteur, leading to the conclusion that physiologists and chemists synergistically contributed to the birth of bacteriology and immunology.     

化学和生物学双学科核心素养的培养

提升学生综合素质、着力发展学生的核心素养是普通高中学科课程标准提出的培养目标,这对教师的专业化发展和核心素养提出了新的要求。为适应高中课程改革和新高考改革,培养一批适教、乐教、善教的双学科复合型高中教师,教育部批复同意开展高素质复合型硕士层次高中教师培养试点。而如何通过学科课程培养师范生的双学科核心素养,是试点专业教学面临的挑战之一。本文紧扣试点专业“化学+生物科学”的培养目标,通过分析化学、生物学两个学科的核心素养,提出将双学科素养融合为物质观念、科学思维、探究实践和态度责任4个方面,促进教师和师范生对双学科核心素养的理解和实践,并以生物化学课程为例对如何培养师范生的双学科核心素养进行了探索、实践,以期为双学科复合型专业的其他课程建设提供借鉴。