Studying Biotechnological Methods Using Animations: The Teacher’s Role

Animation has great potential for improving the way people learn. A number of studies in different scientific disciplines have shown that instruction involving computer animations can facilitate the understanding of processes at the molecular level. However, using animation alone does not ensure learning. Students sometimes miss essential features when they watch only animations, mainly due to the cognitive load involved. Moreover, students seem to attribute a great deal of authority to the computer and may develop misconceptions by taking animations of abstract concepts too literally. In this study, we attempted to explore teachers’ perceptions concerning the use of animations in the classroom while studying biotechnological methods, as well as the teachers’ contribution to the enactment of animations in class. Thirty high-school biotechnology teachers participated in a professional development workshop, aimed at investigating how teachers plan for and support learning with animation while studying biotechnological methods in class. From that sample, two teachers agreed to participate in two case studies aimed at characterizing teachers’ contribution to the enactment of animations in class while studying biotechnological methods. Our findings reveal marked teacher contribution in the following three aspects: establishing the “hands-on” point of view, helping students deal with the cognitive load that accompanies the use of animation, and implementing constructivist aspects of knowledge construction while studying using animations.     

Expansion of Biology Teachers’ Pedagogical Content Knowledge (PCK) During a Long-Term Professional Development Program

Experienced teachers possess a unique teaching knowledge comprised of an inter-related set of knowledge and beliefs that gives direction and justification to a teacher’s actions. This study examined the expansion of two components of pedagogical content knowledge (PCK) of three in-service teachers in the course of a professional development program aimed at designing new teaching and learning materials suggested by the teachers themselves. The research presents an enlargement of previous PCK representations by focusing on a detailed representation of two main PCK domains: teaching and learning, including ten PCK components that emerged in the course of data analysis. This representation enabled revealing the unique PCK held by each teacher and to characterize the expansion of the two components of the participating teachers’ PCK during the long-term professional development program. Retention of major parts of the expanded PCK a year after termination of the program implies that designing and implementing new teaching and learning materials based on the teachers’ experiences, needs, and knowledge in a workshop format accompanied by biology and science education courses might provide a powerful means for PCK expansion. We recommend that designers of professional development programs be aware of the unique PCK held by each teacher in order to promote meaningful professional development of each teacher. Moreover, the PCK representations that were identified in the course of this study enabled clarifying the “orientation toward teaching science” category of PCK which appears to be unclear in current literature.     

Text genre as a factor in the formation of scientific literacy

Learning using primary literature may be a way of developing a capacity for scientific ways of thinking among students. Since reading research articles is a difficult task for novices, we examined the possible benefits of learning using primary literature versus secondary literature, particularly with respect to their influence on the creation and formation of scientific literacy. We report on a comparison between four groups of high school students, each with differing degrees of prior knowledge in biology, who read a domain‐related text written in either the scientific research article genre (adapted primary literature) or the popular‐scientific genre (secondary literature). Although there was no significant difference in the students' ability to summarize the main ideas of each text, indicating that there was no eminent distinction in their content, we found that students who read adapted primary literature demonstrated better inquiry skills, whereas secondary literature readers comprehended the text better and demonstrated less negative attitudes toward the reading task. Since the scientific content of the two texts was essentially identical, we suggest that the differences in students' performances stem from the structure of the text, dictated by its genre. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 403–428, 2005     

Teaching socioscientific issues: classroom culture and students’ performances

The “Treasures in the Sea: Use and Abuse” unit that deals with authentic socioscientific issues related to the Mediterranean was developed as part of a national effort to increase scientific literacy. The unit aimed to enhance active participation of the learners and encourage higher order thinking in class by applying teaching methods that reduce the unfamiliarity felt by students. This was expected through an explicit use of a variety of teaching and assessment-for-learning methods, suitable for Science for All students. Our main goal was to examine the culture of Science for All classes in which the unit was enacted. In order to address the main learning objectives, we monitored students’ performances in tasks that required the higher order thinking skills of argumentation and value judgment, which are central constituents of decision-making processes. We show that while socioscientific issues were discussed in whole class and small group sessions, and students’ argumentation improved, there is still a long way to go in applying a thinking culture in non-science major classes. We suggest that science teachers should shift from traditional content-based and value-free approach, to a sociocultural approach that views science as a community practice and the students as active participants in decision-making processes.     

Identifying meta‐clusters of students' interest in science and their change with age

Nearly 6,000 science questions collected from five different web‐based, TV‐based and school‐based sources were rigorously analyzed in order to identify profiles of K‐12 students' interest in science, and how these profiles change with age. The questions were analyzed according to their topic, thinking level, motivation for and level of autonomy in raising the question, the object of interest and its magnitude, and psychological distance of the object in question from the asker. Characteristics of the asker, such as gender, grade level, and country of origin were also considered, alongside characteristics of the data source, such as language, setting (Internet, school, TV), and the potential science‐attentiveness of the users. Six meta‐clusters of children's and adolescents' interest in science were identified using cluster analysis of their self‐generated science questions. A developmental shift in interest from non‐classical to classical school science subjects was noted. Other age‐related developments, such as an increase in thinking level as reflected by the questions, a decrease in organization level and the psychological distance of the object in question with age were also explored. Advantages and shortcomings of web‐based data collection for educational research are discussed, as are the implications of the results obtained using this methodology for formal science education. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 46: 999–1022, 2009     

Role Taking Ability,Nonverbal Sensitivity,Language and Social Adjustment of Deaf Adolecents

The relationships between social‐cognitive processes, language, and social‐behavioural skills were evaluated by analyzing the data of 68 deaf students, aged 14 to 2o years, who attended special education classes with vocational orientation. The social‐cognitive processes included Role Taking Ability (RTA) and Non‐Verbal Sensitivity (NVS). Language was evaluated by the Peabody Picture Vocabulary Test (PPVT) and by a test of Emotional Vocabulary (EV). Social‐behavioural skills were assessed by Goldstein, Sparfkin, Greshaw and Klein's (1980) Social Skills Checklist. The social‐behavioural skills were used as indicators of social adjustment. The results revealed low performance in all the social‐cognitive abilities. Language played a major role in social adjustment. However, the availability of specific emotional vocabulary was not a better predictor of social adjustment than general language ability. Although RTA was associated with social adjustment, this association was related to language ability, and RTA did not add a unique contribution to the explanation of social adjustment. NVS emerged as an important, special and independent social‐cognitive ability. The results were discussed in relation to the function of language in social cognition.     

Messages About Sex on Israeli Television: Comparing Local and Foreign Programming

A content analysis of 584 prime-time programs examines messages about sex on Israeli television, comparing local and foreign shows. A 2-week composite sample from 7 commercial broadcast, cable, and satellite channels is analyzed. Results show that sexual content is highly prevalent, with a significantly higher frequency in foreign than local shows. Less than 20% of programs with sexual content address sexual health and risks; foreign shows again exceed local ones. Few differences emerge between local and foreign content in the contextual presentation of sex. Findings are discussed in light of theory, research, and implications for audience effects, policy, and education.     

How the Curriculum Guideline “The Cell Is to Be Studied Longitudinally” Is Expressed in Six Israeli Junior-High-School Textbooks

The most recent science and technology curriculum for junior high school in Israel contains a new guideline stating that the cell topic is to be taught “longitudinally in conjunction with other study contents.” This guideline confers a change in teaching the cell topic and provides an opportunity to form meaningful relationships between biological phenomena at the macro level and their cellular explanations. Here, we examined the extent to which six textbooks, available for junior high schools in Israel, support this teaching approach. We found that the textbooks differ in how they express the guideline and that most of them do not support the new teaching approach to any significant extent. Moreover, the textbooks generally emphasize cells’ structure and pay less attention to the processes occurring in them. Our findings could shed light on students’ difficulties in comprehending the living cell and in correlating macroscopic phenomena with their cellular explanations.     

Students’ writing and reading preferences in a paperless classroom

ABSTRACT

This study took place in a school which adopted a “paperless classroom” policy. The purpose of the study was to examine whether students who learn in a paperless classroom really prefer reading and writing on computers rather than on paper and whether their preferences differ according to contextual conditions and personal differences. The findings show that students’ reading and writing preferences depended on the context in which the reading or writing was performed. The boys preferred to read and write on the computer significantly more than girls. Conversely, the girls’ handwriting skills and preference for handwriting were higher than the boys’. Reading and writing on computer was found to be favored among strong students, while weak students tended to prefer using paper. This research also revealed a rapid decrease in favoring computer over paper in both reading and writing over time. Students who had experienced the paperless classroom policy in this school for three years were less supportive of the use of computers for reading and writing than younger students.     

Reading Science Texts—Epistemology, Inquiry, Authenticity—A Rejoinder to Jonathan Osborne

We shall structure this rejoinder around two main sections. In the first, we address three underlying assumptions of our work that Osborne has identified. We indicate points of agreement, disagreement, and clarification. In the second section, we discuss briefly and add our clarifications to three understandings of his that Osborne introduces into the discussion. It should be noted that Osborne’s response is grounded in the same basic assumption as our set of papers, namely, the central role played by reading and writing, and communicative activities in general, both in science and in learning science.