Exploring Biology Teachers’ Pedagogical Content Knowledge in the Teaching of Genetics in Swaziland Science Classrooms

This study explored the pedagogical content knowledge (PCK) and its development of four experienced biology teachers in the context of teaching school genetics. PCK was defined in terms of teacher content knowledge, pedagogical knowledge and knowledge of students’ preconceptions and learning difficulties. Data sources of teacher knowledge base included teacher-constructed concept maps, pre- and post-lesson teacher interviews, video-recorded genetics lessons, post-lesson teacher questionnaire and document analysis of teacher's reflective journals and students’ work samples. The results showed that the teachers’ individual PCK profiles consisted predominantly of declarative and procedural content knowledge in teaching basic genetics concepts. Conditional knowledge, which is a type of meta-knowledge for blending together declarative and procedural knowledge, was also demonstrated by some teachers. Furthermore, the teachers used topic-specific instructional strategies such as context-based teaching, illustrations, peer teaching, and analogies in diverse forms but failed to use physical models and individual or group student experimental activities to assist students’ internalization of the concepts. The finding that all four teachers lacked knowledge of students’ genetics-related preconceptions was equally significant. Formal university education, school context, journal reflection and professional development programmes were considered as contributing to the teachers’ continuing PCK development. Implications of the findings for biology teacher education are briefly discussed.     

Challenges and Accomplishments of Practicing Formative Assessment: a Case Study of College Biology Instructors’ Classrooms

International Journal of Science and Mathematics Education - This study presents a glimpse into the private classrooms of biology instructors and the way they practice formative assessments within...     

Language in Science Classrooms: An Analysis of Physics Teachers’ Use of and Beliefs About Language

The world over, secondary school science is viewed mainly as a practical subject. This may be one reason why effectiveness of teaching approaches in science education has often been judged on the kinds of practical activity with which teachers and students engage. In addition to practical work, language??often written (as in science texts) or oral (as in the form of teacher and student talk)??is unavoidable in effective teaching and learning of science. Generally however, the role of (instructional) language in quality of learning of school science has remained out of focus in science education research. This has been in spite of findings in empirical research on difficulties science students encounter with words of the instructional language used in science. The findings have suggested that use of (instructional) language in science texts and classrooms can be a major influence on the level of students?? understandings and retention of science concepts. This article reports and discusses findings in an investigation of physics teachers?? approaches to use of and their beliefs about classroom instructional language. Direct classroom observations of, interviews with, as well as content analyses of the participant teachers?? verbatim classroom talk, were used as the methods of data collection. Evidence is presented of participant physics teachers?? lack of explicit awareness of the difficulty, nature, and functional value of different categories of words in the instructional language. In conclusion, the implications of this lack of explicit awareness on the general education (initial and in-service) of school physics teachers are considered.     

Teaching Genetics in Secondary Classrooms: a Linguistic Analysis of Teachers’ Talk About Proteins

This study investigates Swedish biology teachers’ inclusion of proteins when teaching genetics in grade nine (students 15–16 years old). For some years, there has been a call to give attention to proteins when teaching genetics as a means of linking the concepts ‘gene’ and ‘trait’. Students are known to have problems with this relation because the concepts belong to different organizational levels. However, we know little about how the topic is taught and therefore this case study focuses on how teachers talk about proteins while teaching genetics and if they use proteins as a link between the micro and macro level. Four teachers were recorded during entire genetics teaching sequences, 45 lessons in total. The teachers’ verbal communication was then analyzed using thematic pattern analysis, which is based in systemic functional linguistics. The linguistic analysis of teachers’ talk in action revealed great variations in both the extent to which they used proteins in explanations of genetics and the ways they included proteins in linking genes and traits. Two of the teachers used protein as a link between gene and trait, while two did not. Three of the four teachers included instruction about protein synthesis. The common message from all teachers was that proteins are built, but none of the teachers talked about genes as exclusively encoding proteins. Our results suggest that students’ common lack of understanding of proteins as an intermediate link between gene and trait could be explained by limitations in the way the subject is taught.     

Teachers’ Use of YouTube in the United Arab Emirates: An Exploratory Study

Teachers around the world are using YouTube movies for different purposes. This mixed-methods study was a preliminary investigation of United Arab Emirates teachers’ perceptions about YouTube's advantages in the classroom, current practices, and major challenges faced. Forty-five teachers completed an open-ended questionnaire. Results indicated that perceived advantages included supporting the learning process, increasing interest and efficiency, and enriching content. Moreover, findings revealed that the majority of participants were using videos for presentation purposes in teacher-led classrooms. Connectivity, technical issues, appropriateness of content, and administrative support were perceived as major challenges.     

Teachers’ Perceptions of Infusion of Values in Science Lessons: a Qualitative Study

Research in Science Education - Much has been written and debated on the importance of including moral, character or values education in school curricula. In line with this, teachers’ views...     

Elementary Teachers’ Perception of Language Issues in Science Classrooms

Although the importance of language in science learning has been widely recognized by researchers, there is limited research on how science teachers perceive the roles that language plays in science classrooms. As part of an intervention design project that aimed to enhance teachers’ capacity to address the language demands of science, interview data (N = 9) were collected to understand teachers’ perceptions and experiences with a wide range of issues related to language use in science classrooms. Adopting an interpretive approach to qualitative data, the analysis revealed that the teachers perceive a wide range of student difficulties related to language use in science classrooms, especially to the use of specialized terms and writing. Although the teachers are keenly aware of how language can be a barrier to learning science, they are less certain as to what students need to know about the language of science in order to master it. The findings suggested professional support that highlights the distinctive language demands of science and how these demands differ from other subject areas could be useful to these elementary school teachers.     

Examining Teachers’ Instructional Moves Aimed at Developing Students’ Ideas and Questions in Learner-Centered Science Classrooms

Prior research has shown that orchestrating scientific discourse in classrooms is difficult and takes a great deal of effort on the part of teachers. In this study, we examined teachers?? instructional moves to elicit and develop students?? ideas and questions as they orchestrated discourse with their fifth grade students during a learner-centered environmental biology unit. The unit materials included features meant to support teachers in eliciting and working with students?? ideas and questions as a source for student-led investigations. We present three contrasting cases of teachers to highlight evidence that shows teachers?? differing strategies for eliciting students?? ideas and questions, and for developing their ideas, questions and questioning skills. Results from our cross case analysis provide insight into the ways in which teachers?? enactments enabled them to work with students?? ideas and questions to help advance learning. Consistent with other studies, we found that teachers could readily elicit ideas and questions but experienced challenges in helping students develop them. Findings suggest a need for more specified supports, such as specific discourse strategies, to help teachers attend to student thinking. We explore implications for curricular tools and discuss a need for more examples of effective discourse moves for use by teachers in orchestrating scientific discourse.     

Teachers’ Literal and Inferential Questions and Children’s Responses: A Study of Teacher–Child Linguistic Interactions During Whole-Group Instruction in Hong Kong Kindergarten Classrooms

This study investigated the extent to which preschool teachers and children (ages 4–6) used literal and inferential language within the context of whole-group instruction in four kindergarten classrooms in Hong Kong. A total of 20 sessions of videotaped classroom observations of linguistic interactions between teachers and children were transcribed and then analyzed using a coding scheme to determine the cognitive complexity of teacher questions and child responses with reference to four levels of abstraction, representing a literal-to-inferential continuum. The results indicated that the teachers’ questions were predominantly literal in nature (83 %), and similarly the majority of the children’s responses (77 %) were also literal. Furthermore, it was revealed that in an average instructional session: (a) teachers produced significantly more utterances than children; (b) the difference in the quantity of teachers’ questions between literal and inferential levels was statistically significant; (c) similarly, the difference in the quantity of children’s responses between literal and inferential levels was also statistically significant; and (d) children produced a significantly larger quantity of shorter than longer utterances. As there is distinct value in whole-group instruction as a salient context for teacher–child interactive, linguistic engagement in kindergarten classrooms in Hong Kong, it is particularly vital that early childhood educators understand what types of linguistic interactions are occurring there and how to target professional development for teachers to better support language learning in young children.     

Teachers’ Integration of Scientific and Engineering Practices in Primary Classrooms

The Next-Generation Science Standards (NGSS) challenge primary teachers and students to work and think like scientists and engineers as they strive to understand complex concepts. Teachers and teacher educators can leverage what is already known about inquiry teaching as they plan instruction to help students meet the new standards. This cross-case analysis of a multiple case study examined teacher practices in the context of a semester-long professional development course for elementary teachers. We reviewed lessons and teacher reflections, examining how kindergarten and first grade teachers incorporated NGSS scientific and engineering practices during inquiry-based instruction. We found that most of the teachers worked with their students on asking questions; planning and carrying out investigations; analyzing and interpreting data, using mathematics and computational thinking; and obtaining, evaluating and communicating information. Teachers faced challenges in supporting students in developing their own questions that could be investigated and using data collection strategies that aligned with students’ development of number sense concepts. Also, some teachers overemphasized the scientific method and lacked clarity in how they elicited and responded to student predictions. Discussion focuses on teacher supports that will be needed as states transition to NGSS.     

Teaching and Learning Science in Authoritative Classrooms: Teachers’ Power and Students’ Approval in Korean Elementary Classrooms

Research in Science Education - This study aims to understand interactions in Korean elementary science classrooms, which are heavily influenced by Confucianism. Ethnographic observations of two...     

Preparing Teachers to Use GIS: The Impact of a Hybrid Professional Development Program on Teachers’ Use of GIS

This article reports the findings of a 3-year study of a hybrid professional development program designed to prepare science and mathematics teachers to implement GIS in their classrooms. The study was conducted as part of the CoastLines Innovative Technology Experiences for Students and Teachers project funded by the National Science Foundation. Three cohorts of teachers participated in the program, with each participant receiving 40 h of synchronous online instruction and 80 h of in-person instruction and support over an 8-month period. Data from surveys of participants both before and after the program were analyzed using correlation, ordinary least squares, and ordered logit regression analyses. The analyses revealed increases in the self-reported frequency of GIS use and enhanced feelings of preparation, competence, community, and comfort with respect to using GIS for instruction. A composite index of all impact variables was positively influenced as well. The statistical analyses found a strong relationship between self-reported feelings of preparation and use of GIS. Some support was found for the idea that feelings of competence, community, and comfort were related to the teachers’ sense of preparation. The findings suggest that a robust hybrid model of teacher professional development can prepare teachers to use GIS in their classrooms. More research is needed to understand how hybrid models influence the sociopsychological and other dimensions that support teachers’ feelings of preparation to implement GIS.

     

Teachers’ Critical Evaluations of Dynamic Geometry Software Implementation in 1:1 Classrooms

Although the use of dynamic software in high school mathematics in the United States has emerged as a research topic, little research has been conducted on how teachers integrate new software in relation to at-home technology networks. Interviews with eight mathematics teachers from four North Carolina counties participating in 1:1 laptop initiatives are analyzed to trace similar decision-making themes, including Internet access, laptop availability, software use, and teacher training. This article outlines how current technologies in classrooms were critically examined by the teachers and how network connectivity impressions affected hardware and software use.     

Use of the “Tree” Analogy in Evolution Teaching by Biology Teachers

This work discusses the use of Darwin’s ‘Tree of Life’ as a didactic analogy and metaphor in teaching evolution. It investigates whether biology teachers of pupils from 17 to 18 years old know Darwin’s text ‘Tree of Life’. In addition, it examines whether those teachers systematically employ either the analogies present in that text or other analogies between the tree and evolution, and whether they adopt a specific methodology for teaching with analogies and metaphors (A&M). The academic training of teachers regarding use of A&M is review briefly. A diagnostic study was carried out with biology teachers in a public school in the town of Contagem in the state of Minas Gerais in Brazil. The data were obtained through direct observation, questionnaires and a focus group. The teachers pointed out in the questionnaires that some details of Darwin’s analogy are utilized as a resource. However, analysis of the data indicates that the ‘Tree of Life’ text is not known or utilized in class. At the same time, the teachers state that they use aspects of the tree as a didactic resource to teach evolution and that its use facilitates the learning of content. The teachers have little knowledge of specific methodologies of teaching with analogies and metaphors, revealing that their training is incomplete in this area.     

Secondary Science Student Teachers’ Use of Verbal Discourse to Communicate Scientific Ideas in Their Field Placement Classrooms

Research in Science Education - Student teachers struggle to identify themselves as teachers in their field placement during their student teaching year, and some of the difficulty can be...     

Retaining Black Teachers: An Examination of Black Female Teachers’ Intentions to Remain in K-12 Classrooms

Sixty years after Brown v. Board of Education, retention trends indicate that there is a Black teacher shortage. Research shows that Black teachers’ retention rates are often lower than the retention rates of White teachers. Black teachers report low salaries, lack of administrative support, and other school variables as reasons for leaving the teaching profession. Seeking to alter the predominantly White, middle class teaching force and potentially impact students’ educational experiences, this qualitative study examines twelve Black female teachers’ intentions to remain in the K-12 classroom. Utilizing conventional content analysis, three themes emerged regarding the retention of Black female teachers. Conclusions, recommendations, and implications are offered for school administrators and educational policymakers.     

Associations Among Professional Development,Teachers’ Use of Naturalistic Language Strategies,and Preschoolers’ Functional Communication

Research Findings: Naturalistic instruction is the intentional use of strategies embedded within typical activities of the environment to create learning opportunities for children. We used multilevel modeling to analyze data from this single-case design study that focused on improving teachers’ use of naturalistic language strategies and children’s communication through professional development with bug-in-ear coaching. Our results showed that professional development was positively associated with children’s communication during and after professional development. During generalization sessions in different types of activities, teachers’ use of the naturalistic language strategies was positively associated with children’s functional communication. We also found that children were more likely to communicate during child-led activities. Practice or Policy: Associations among professional development, teachers’ use of evidence-based strategies, and children’s outcomes have yet to be fully understood. Administrators and professional development providers should support teachers’ use of naturalistic language strategies to create equitable exposure to language-learning opportunities for all children. Moreover, professional development efforts should support teachers’ intentional use of child-led activities to embed language-learning opportunities based on children’s interests. Finally, to strengthen children’s generalization of skills across routines, professional development providers should identify methods to support teachers’ generalized use of strategies within the typical activities of the setting.     

Questioning Questions: Elementary Teachers’ Adaptations of Investigation Questions Across the Inquiry Continuum

Questioning is a central practice in science classrooms. However, not every question translates into a “good” science investigation. Questions that drive science investigations can be provided by many sources including the teacher, the curriculum, or the student. The variations in the source of investigation questions were explored in this study. A dataset of 120 elementary science classroom videos and associated lesson plans from 40 elementary teachers (K-5) across 21 elementary school campuses were scored on an instrument measuring the amount of teacher-direction or student-direction of the lessons’ investigation questions. Results indicated that the investigation questions were overwhelmingly teacher directed in nature, with no opportunities for students to develop their own questions for investigation. This study has implications for researchers and practitioners alike, calling attention to the teacher-directed nature of investigation questions in existing science curriculum materials, and the need for teacher training in instructional strategies to adapt their existing curriculum materials across the continuum of teacher-directed and student-directed investigation questions. Teachers need strategies for adapting the teacher-directed questions provided in their existing curriculum materials in order to allow students the opportunity to engage in this essential scientific practice.     

Elementary Teachers’ Use of Graphical Representations in Science Teaching

The purpose of this study was to obtain data on United States K-5 elementary school teachers’ self-reported instructional practices with graphical representations. Via an electronic survey, 388 elementary teachers, from throughout the US, reported about their teaching of the interpretation and the production of graphics within science. The main findings indicate that: (1) pointing to or referring to graphical representations in books (92% of respondents) was the most frequently used instructional practice across the disciplines and grade levels; (2) five of nine graphical representations (over 90%) were more frequently used in science instruction than in other content areas, and (3) students’ graphical productions involving drawings, labeling, and oral and written explanations were very infrequent. The findings indicate that while teachers may tacitly use graphics within science instruction, they may not be explicitly teaching about this visual form of communication.