Understandings and misunderstandings of eighth graders of five chemistry concepts found in textbooks

The research reported in this study was designed to answer three questions: (a) What misconceptions do eighth grade students have concerning the chemistry concepts from their textbooks. (b) How is reasoning ability related to misconceptions concerning chemistry concepts. (c) How effective are textbooks in teaching an understanding of chemistry concepts? Five chemistry concepts were used in the study: chemical change, dissolution, conservation of atoms, periodicity, and phase change. Problems concerning the five concepts were given to 247 eighth-grade students in order to assess the students' degree of understanding of chemistry concepts and to identify specific misconceptions. Two pencil-and-paper Piaget-type tasks were used to assess intellectual level. A comparison of intellectual level and scores on the chemistry concepts showed moderate correlations. However, the small number of formal operational students in the sample makes these results inconclusive. A study of the level of understanding of the five chemistry concepts and the nature of the misconceptions held by students indicate a general failure of textbooks to teach a reasonable understanding of chemistry concepts.     

VIOLENCE DIRECTED AGAINST TEACHERS: RESULTS FROM A NATIONAL SURVEY

Teachers in U.S. schools report high rates of victimization, yet previous studies focus on select types of victimization and student perpetrators, which may underestimate the extent of the problem. This national study was based on work conducted by the American Psychological Association Classroom Violence Directed Against Teachers Task Force and is one of the few national studies to examine violence directed at teachers. Participants included 2,998 kindergarten through 12^th‐grade (K‐12) teachers from 48 states who completed an anonymous web‐based survey assessing their experiences with victimization. Results revealed that 80% of teachers reported at least one victimization, and of these teachers, 94% reported being victimized by students. Nearly three‐fourths of all teachers experienced at least one harassment offense, more than half experienced property offenses, and 44% reported physical attacks. Findings suggest that specific teacher and community characteristics are associated with a higher likelihood of victimization, namely, male gender and urban settings; whereas, African American teachers were less likely to report victimization. Implications for teacher training, school interventions, public policy, and future research are discussed.     

Student suspension: A critical reappraisal

This paper analyzes national level data, gathered for the Safe School Study, to directly address the question, “Why are students suspended from school?” Data are available on students in both junior and senior high schools from a representative sample of the nation's schools. Using a range of analytical techniques, the paper attempts to tease out the relationships between (1) student misbehavior at varying types of schools and suspension rates, (2) the effects of teacher judgments and attitudes, (3) the effect of administrative structures, (4) the effect of perceived academic potential, and (5) the effect of racial bias. It is concluded that suspension rates cannot be regarded as a simple reflection of student misbehavior in school, but rather as the result of a complex of factors grounded in the ways schools operate. Suspension rates are best predicted by (1) knowing the kind of school a student went to, and (2) knowing how that school was run.     

The relationship between affective response to social comparison and academic performance in high school

The goal of the present study was to study the relationship between affective responses to social comparison and test scores among high school students. Our analyses showed that three types of responses to social comparison could be distinguished: an empathic, constructive, and destructive response. Whereas girls scored higher on empathic response, boys scored higher on destructive response. In addition, students who had a high social comparison orientation (SCO) scored higher on all three types of responses than students who expressed a low SCO. Multilevel regression analyses indicated that, after controlling for previous performance, a destructive response was negatively related to performance on tests for reading comprehension and mathematics. An empathic response was positively related to performance on reading comprehension only whereas a constructive response compensated the negative relationship between destructive response and reading comprehension. Theoretical and practical implications are discussed.     

Agent‐Based Modeling of Growth Processes

Growth processes abound in nature, and are frequently the target of modeling exercises in the sciences. In this article we illustrate an agent‐based approach to modeling, in the case of a single example from the social sciences: bullying.     

Leucine125Valine (Leu125Val) Gene Polymorphism of Platelet Endothelial Cell Adhesion Molecule-1 (PECAM-1) and Myocardial Infarction in Indian Population

Platelet-endothelial cell adhesion molecule-1 (PECAM-1) has role in atherosclerotic plaque development as well as in thrombosis leading to myocardial infarction (MI). Present study was aimed to analyse the association of PECAM-1 Leu125Val gene polymorphism with MI in Indian population. Subjects included healthy individuals as control (N = 116) and MI patients (N = 100) divided into two groups; MI patients at presentation of the acute event (MI-Group-1, N = 46) and patients with recent event of MI stabilized with treatment 4.5 days from their symptoms (MI-Group-2, N = 54). The difference in the distribution of Leu125Val genotype frequencies of controls and patients did not reach statistical significance. However Leu allele frequency (0.57) was more associated with MI patients as compared to control (0.504). sPECAM-1 levels were significantly elevated in patients at acute event of MI (MI-Group-1) by 44.1% (P = 0.009) as compared to controls and by 95.2% (P = 0.001) as compared to stabilized MI patients (MI-Group-2).     

Union gives strength: mainstream and special education teachers’ responsibilities in inclusive co-taught classrooms

Co-teaching has gained considerable interest as a means of promoting the inclusion of students with disabilities in mainstream education. Nowadays, there is a consensus among researchers that co-teaching should provide effective education to all students in a mainstream class. This study aims to explore co-teachers’ attitudes towards co-teaching responsibilities in Greek mainstream classrooms. In particular, it examines co-teachers’ attitudes with regard to their non-class-time (planning and evaluation) and class-time (instruction and behaviour management) responsibilities for students with and without disabilities. Four hundred co-teachers participated in this survey study. Overall, our findings demonstrate that mainstream education teachers and special education teachers disagree about their respective class-time and non-class-time responsibilities, and that their role influences their attitudes towards these responsibilities. The study concludes that the different attitudes of co-teachers towards their responsibilities could hinder the development of a shared approach in teaching students with and without disabilities in inclusive classrooms.

Union gives strength

Aesop

(ca. 620-564 BC)