Ethanol-glycerin fixation with thymol conservation: a potential alternative to formaldehyde and phenol embalming

Anatomical fixation and conservation are required to prevent specimens from undergoing autolysis and decomposition. While fixation is the primary arrest of the structures responsible for autolysis and decomposition, conservation preserves the state of fixation. Although commonly used, formaldehyde has been classified as carcinogenic to humans. For this reason, an adequate substitute was developed. Ethanol-glycerin fixation and thymol conservation are described and compared with formaldehyde and phenol in this technical report. The setup, tissue qualities, financial aspects, and health concerns of this method are discussed. Ethanol-glycerin fixation and thymol conservation provide outstanding haptic and optic tissue qualities. Typical formaldehyde and phenol effects, such as skin, airway, and eye irritation, as well as carcinogenic effects, can be circumvented by using ethanol-glycerin and thymol instead. Ethanol-glycerin fixation is more expensive than formaldehyde and requires an explosion-proof facility. However, the absence of health effects and its convincing tissue qualities balance these higher costs. Therefore, ethanol-glycerin fixation and thymol conservation provide a potential alternative and complement established fixation techniques. The use of carcinogenic formaldehyde and toxic phenol can be effectively restricted through the use of the described method.     

Teachers' Assessments of Students' Achievements: The Ecological Validity of Studies Using Case Vignettes

In two studies, we investigated the extent to which research using case vignettes of fictitious students is able to yield research results that are ecologically valid representations of teachers' assessments of students' educational achievement in their real classrooms. The type of assessment was teachers' tracking decisions from primary to secondary school. In Study 1, which was conducted in the German educational system, teachers decided which secondary school track their own students would attend and were subsequently confronted with the same decision for fictitious students described in vignettes. Study 2 was a replication in the Luxembourgish educational system. Ordinal and logistic regression models were used to compare decision making in the two conditions of actual students versus case vignettes. No major differences were found between the two conditions. Results are discussed with respect to the ecological validity of research designs that use case vignettes.     

Professional Competence of Prospective Teachers in Business and Economics Education: Evaluation of a Competence Model Using Structural Equation Modeling

Teacher competence is crucial for quality of teaching and learner achievement. Competency models and competence measurement are prevalent in domains such as the natural sciences and lacking in others. We conducted our research in the field of business and economics education by focusing on the accounting domain because it is key to a deep understanding of the economic context and the development of economics competence. To teach well, teachers require professional knowledge, which is mainly composed of content knowledge (CK), pedagogical content knowledge (PCK), and pedagogical knowledge (PK). Our competence model comprises the cognitive component of professional knowledge and the noncognitive components of beliefs, self-efficacy, and self-regulation. To measure competence in competence of prospective teachers, we employed novel instruments to test for professional knowledge and beliefs as well as established ones to test for self-regulation and self-efficacy. The sample consists of 1,152 students at 24 German universities. The structure of the competence model was tested. Results suggest that professional competence in accounting has at least four distinct dimensions (CK, PCK, beliefs, and self-regulation aspects).     

Preservice teachers’ implicit attitudes toward students with and without immigration background: A pilot study

Minority students are often disadvantaged in school. One factor contributing to this disadvantage may be teachers’ judgments; these may, in turn, be influenced by implicit attitudes. Implicit attitudes often guide automatic behavior, which comes into play when cognitive resources are restrained. This is particularly important for preservice teachers, who lack experience in the classroom. In an affective priming task, results showed ambivalent implicit attitudes toward students with immigration background and positive implicit attitudes toward native students. Such asymmetrical implicit evaluations could bias preservice teachers’ interactions with students in the classroom. Acquiring an understanding of the influence of implicit attitudes during their academic studies might help preservice teachers counter implicit and automatic influences.     

The pedagogic signature of special needs education

The goal of the following study is to identify a pedagogic signature, according to LS Shulman, for working with students who have special educational needs. Special educational needs are defined as significant limitations in personal development and learning which require particular educational measures beyond regular education. The development of a pedagogic signature should create an identity and provide guidance, particularly for teachers who are working in the context of inclusive schools with no prior knowledge or training in this regard. The study is carried out against the background of the structural uncertainty of the teaching profession and takes into consideration existing normative, theoretical and empirical approaches in education. Existing research regarding demands is largely theoretical, while empirical research is rudimentary. The present study used a multi-method approach to identify demands for working with students with special educational needs. Experts in the areas of learning disabilities and emotional/behavioural disorders completed an instrument from the field of industrial and organisational psychology, quantifying and weighting professional demands on teachers according to their importance. The results were added and validated through group discussions, creating a demand profile. By combining the results with the dimensions of a signature pedagogy, according to Shulman, it is apparent that surface structure and deep structure play a minor role in the perceptions of special needs teachers. The central importance of the implicit structure is characteristic of the pedagogic signature. This importance is represented by the target group’s emphasis on demands such as having an appreciative leadership or authenticity. An even greater emphasis is placed on the aspect of attitude – this is having a humanistic ethos. The demand profile and the resulting consequences for the practice of teaching will be considered with a view towards current problems and questions in research and practice, and particularly with regard to inclusion.     

Internal and external influences on vocabulary development in preschool children

Competency in society's lingua franca plays a major role in the emergence of social disparities within education. Therefore, the present longitudinal study investigates vocabulary development and its predictors in preschool years. We focus on whether internal (phonological working memory) and external variables (preschool and home learning environment) have different impacts depending on parental native language. The study considers 547 children from 97 German preschools. Children's vocabulary was assessed at the ages of 3, 4, and 5 years. Latent growth curve models show that non-native German language children are characterized by reduced vocabulary at first assessment and lower progress compared to monolingual peers. Phonological working memory has a strong impact on all children's initial vocabulary but also on vocabulary growth in those whose parents speak German as an additional language. The effects of preschool and home learning environment are comparatively smaller.     

Effects of a Science Education Module on Attitudes towards Modern Biotechnology of Secondary School Students

This article evaluated the impact of a four‐lesson science module on the attitudes of secondary school students. This science module (on cancer and modern biotechnology) utilises several design principles, related to a social constructivist perspective on learning. The expectation was that the module would help students become more articulate in this particular field. In a quasi‐experimental design (experimental‐, control groups, and pre‐ and post‐tests), secondary school students’ attitudes (N = 365) towards modern biotechnology were measured by a questionnaire. Data were analysed using Chi‐square tests. Significant differences were obtained between the control and experimental conditions. Results showed that the science module had a significant effect on attitudes, although predominantly towards a more supportive and not towards a more critical stance. It is discussed that offering a science module of this kind can indeed encourage students to become more aware of modern biotechnology, although promoting a more critical attitude towards modern biotechnology should receive more attention.     

An Exploration of Attitudes towards Modern Biotechnology: A study among Dutch secondary school students

Modern biotechnology will have a large impact on society and requires informed decision‐making and critical attitudes toward biotechnology among the public. This study aims to explore these attitudes in secondary education. For this purpose, a questionnaire was constructed according to the general tripartite theory of attitudes. A total of 574 Dutch secondary school students completed the questionnaire. Based on principal component analyses, several distinct and independent cognitive, affective, and behavioural factors were found, demonstrating that attitudes towards biotechnology are a multi‐component concept. In a cluster analysis on these factors, we found four interpretable clusters representing different groups of students. The four groups are labelled “confident supporter” (22%), “not sure” (42%), “concerned sceptic” (18%), and “not for me” (17%). These results indicate that there is a diverse appraisal of modern biotechnology among secondary school students. Suggestions for educational interventions are made.     

Preparing German pre-service teachers in special needs education for school development—Can we do otherwise?

Although school development can be viewed as an emerging responsibility of teachers, special needs education in Germany does not leave sufficient room for non-teaching tasks, leading to a knowledge gap in the professionalisation of pre-service teachers with regard to school development upon entering the profession. This study focused on the preparedness of pre-service teachers in school development as a professional task at the end of their initial teacher training. The respondents of the interview study are 12 pre-service teachers enrolled at master level in special educational needs at a German university. The findings of the study report on the marginal situatedness of school development in the curriculum, the associated understanding of pre-service teachers of school development and their low assessment of the relevance of school development within special needs education. The study closes with practical recommendations on how to tackle the low level of preparedness for school development tasks in German teacher education.