Pre-service biology teachers’ perceptions on the instruction of socio-scientific issues in the curriculum

The work presented here represents a preliminary attempt to address the role of teachers in supporting students’ learning on socio-scientific issues (SSI) by characterising pre-service biology teachers’ perceptions and adaptation of curriculum and identifying factors that serve to mediate this process. A hundred and two undergraduate pre-service biology teachers took part in this study over the course of one semester. The teacher candidates (72% female) completed a questionnaire comprising Likert-type and open-ended questions. The results indicated that the teacher candidates perceived a need to address SSI positively. Pre-service teachers had moderate personal teaching efficacy beliefs related to teaching about SSI. They also identified the lack of instructional time and the unavailability of relevant materials as the primary obstacles hindering the teaching of SSI. The implications for teacher education and the design of curriculum materials with respect to SSI are discussed.     

Bilingual teaching of molecular biology

Recently bilingual teaching in China＇s universities has been widely carded out and become a popular subject for study. In this paper, the reasons for bilingual teaching of molecular biology are pointed out, the textbook of molecular biology and teaching method in bilingual teaching classes are determined after investigation and the practice of bilingually teaching molecular biology use both English and Chinese in a class. The effect has proved good. The bilingual teaching methods, the problem of bilingual teaching, the importance of understanding its significance and the possibilities of improving such teaching of the subject are also discussed.     

Characterising the development of the understanding of human body systems in high-school biology students – a longitudinal study

ABSTRACT

Science education today has become increasingly focused on research into complex natural, social and technological systems. In this study, we examined the development of high-school biology students’ systems understanding of the human body, in a three-year longitudinal study. The development of the students’ system understanding was evaluated using the Components Mechanisms Phenomena (CMP) framework for conceptual representation. We coded and analysed the repertory grid personal constructs of 67 high-school biology students at 4 points throughout the study. Our data analysis builds on the assumption that systems understanding entails a perception of all the system categories, including structures within the system (its Components), specific processes and interactions at the macro and micro levels (Mechanisms), and the Phenomena that present the macro scale of processes and patterns within a system. Our findings suggest that as the learning process progressed, the systems understanding of our students became more advanced, moving forward within each of the major CMP categories. Moreover, there was an increase in the mechanism complexity presented by the students, manifested by more students describing mechanisms at the molecular level. Thus, the ‘mechanism’ category and the micro level are critical components that enable students to understand system-level phenomena such as homeostasis.     

The relationship between biology teachers’ understanding of the nature of science and the understanding and acceptance of the theory of evolution

ABSTRACT

Despite the importance of the theory of evolution (TE) to scientific knowledge, a number of misconceptions continue to be found among biology teachers. In this context, the first objective of this study was to identify the impact of professional development programme (PDP) on teachers’ understanding of nature of science (NOS) and evolution and on the acceptance of this theory. Its second objective was to study the relationship among these variables. Three instruments were used to quantify these variables: the Views of the Nature of Science Version D (VNOS D+), the Assessing Contextual Reasoning about Natural Selection (ACORN), and the Measure of Acceptance of Theory of Evolution (MATE). The results indicate that the PDP had a positive impact on teachers, significantly improving their understanding of the NOS and natural selection, as well as their acceptance of the TE. Furthermore, a positive correlation between the understanding of the NOS obtained by teachers in the first part of the PDP and the understanding and acceptance of evolution that these teachers showed at the end of the programme was determined. However, no relationship between an understanding of the NOS and gains in the understanding and acceptance of evolution was found.     

Block scheduled versus traditional biology teaching—an educational experiment using the water lily

In this study, we compared a traditional teaching sequence (four distinct lessons) with a block schedule dealing with the ecological adaptations of the water lily. The educational unit contained original plant material and both experimental groups received the same tasks and working sheets. Pupils worked together in groups of three to four pupils in a self-regulated manner, carrying out hands-on experiments. However, both groups differed in their time schedule (four distinct lessons of 45 min versus one block of 180 min). Pupils from the traditionally scheduled education performed significantly better in the immediate post-test while these differences merged in retention.     

How might Covid-19 affect the biology curricula of the future? Two principles for curriculum developers to consider

PROSPECTS - Understanding the lifestyle changes that authorities have requested or required in response to Covid-19 requires some biological knowledge. Therefore, articulations of intended biology...     

Recurring patterns in the development of high school biology students’ system thinking over time

The goal of this study was to identify and understand the mental models developed by 67 high school biology students as they learn about the human body as a complex system. Using concept maps, it sought to find an external way of representing how students organize their ideas about the human body system in their minds. We conducted a qualitative analysis of four concept maps created by each student throughout the 3-year learning process, which allowed us to identify that student’s systems thinking skills and the development of those skills over time. The improvement trajectories of the students were defined according to three central characteristics of complex systems: (a) hierarchy, (b) homeostasis and (c) dynamism. A comparative analysis of all of our students’ individual trajectories together revealed four typical learning patterns, each of which reflects a different form of development for systems thinking: “from the structure to the process level”, “from macro to micro level”, “from the cellular level to the organism level,” and “development in complexity of homeostasis mechanisms”. Despite their differences, each of these models developed over time from simpler structures, which evolved as they connected with more complex system aspects, and each indicates advancement in the student’s systems thinking.     

Stress and emotions during experiments in biology classes: Does the work setting matter?

Experiments are a complex teaching method carrying a high cognitive load and the risk of failure, which both may induce stress among students. However, it remains unclear if the work setting modulates physiological, subjective, and/or emotional stress responses during experiments. In a randomized experimental field study school students (N = 104) either watched a biology experiment on video (passive condition), conducted the experiment on their own (active condition) or in small groups (interactive condition). Meanwhile, their subjective stress perception, heart rate variability (HRV), salivary cortisol concentration, and achievement emotions were assessed. In the active condition we observed the strongest subjective and HRV stress responses, followed by the interactive condition. Students of the passive condition displayed the weakest stress reactions. Students of the other two conditions showed a weakened diurnal cortisol decrease, indicating more stress. Across conditions, enjoyment dropped and boredom increased, most pronounced in the passive condition. Moreover, there were some associations between subjective, emotional and physiological stress responses. The findings suggest that conducting experiments alone carries the risk of self-attributed failure signified by elevated stress. In contrast, conducting an experiment in a group is less stressful, as others may constitute a source of support. Watching others conduct an experiment carries a low risk of failure and, thus, the lowest stress responses, but comes with the cost of minimized enjoyment and maximized boredom.     

Philosophy in the science classroom: How should biology teachers explain the relationship between science and religion to students?

This review explores Thomas Lessl’s “Demarcation as a classroom response to creationism: A critical examination of the National Academy of Science’s Science, Evolution, and Creationism (2008).” Lessl’s work examines philosophical debates about the relationship between science and religion from the perspective of communication dynamics between science teachers and audiences skeptical about evolution. His essay raises a number of important points that might help educators craft statements that are less likely to alienate religious students and to entrench any pre-existing opposition to evolutionary science. However, in this review, I raise a number of criticisms of Lessl’s account of the problems with the approach taken by the National Academy of Science. I argue that many of the criticisms of NAS’s approach to demarcation are not well-supported, and even were they to be strong criticisms, they do not justify skepticism toward evolution or science in general. Ultimately, I argue that addressing Lessl’s concerns means creating space for more intellectually rigorous and satisfying discussions of science and religion, but this is not appropriate in a biology classroom that merely wishes to introduce evolution. Addressing these concerns requires making more space for philosophy in the curriculum.

     

How is the body’s systemic nature manifested amongst high school biology students?

This study follows two groups of students (67 in all) through the 3 years of their high school biology education and examines the development of their systems thinking - specifically their models of the human body as a system. Both groups were composed of biology majors, but the students in one group also participated in a PBLbased extension program called “Medical Systems”. Data was gathered by means of concept maps, which the students completed at four strategic stages of the learning process: beginning of 10th grade, end of 10th grade, end of 11th grade and end of 12th grade. At the end of the 3 year learning process, the students’ showed more complex system models. They included a wider range of concepts in their maps, spanning hierarchy levels ranging from the molecular and cellular to the system level. We also found an increase in references to dynamic interactions, but this did not encourage the students to use cellular level processes when explaining phenomena that occur at the systems level. The impact of the PBL teaching method was strongly evident in the complexity of the Medical Systems program students’ concept maps, which heavily emphasized “hierarchy” and “diseases” as system characteristics.     

Students’ motivation in biology lessons—can student autonomy reduce the gender gap?

When it comes to biology lessons in Germany, girls generally exhibit higher levels of self-determined motivation than boys. Previous research suggests that fostering student autonomy could be a way to effectively address this gender gap. To investigate gender-related effects in biology education, a sample of 303 sixth-grade students (M_age = 11.31 years, SD_age = 0.58 years) participated in a 3-h teaching unit on harvest mice that was taught in either an autonomy-supportive or controlling manner. The results revealed a significant effect of the treatment on self-determined motivation, with the effect being stronger for the boys. In the treatment with controlling teaching behavior, gender-related differences in self-determined motivation became apparent. In contrast, the gender gap was mainly smaller in the treatment with autonomy-supportive teaching behavior. Thus, the results suggest that satisfying the need for autonomy appears to be an effective means to help bridge the gender gap in biology lessons.

     

Prospective biology teachers’ understanding of the nature of science through an analysis of the historical case of Semmelweis and childbed fever

Cultural Studies of Science Education - This article presents a qualitative study of the understanding of various epistemic and non-epistemic aspects of the nature of science (NOS), based on...     

Developing biology teachers’ pedagogical content knowledge through learning study: the case of teaching human evolution

This work explores how pedagogical content knowledge (PCK) on evolution was modified by two biology teachers who participated in a professional development programme (PDP) that included a subsequent follow-up in the classroom. The PDP spanned a semester and included activities such as content updates, collaborative lesson planning, and the presentation of planned lessons. In the follow-up part, the lessons were videotaped and analysed, identifying strategies, activities, and conditions based on student learning about the theory of evolution. Data were collected in the first round with an interview before the training process, identifying these teachers’ initial content representation (CoRe) for evolution. Then, a group interview was conducted after the lessons, and, finally, an interview of stimulated recall with each teacher was conducted regarding the subject taught to allow teachers to reflect on their practice (final CoRe). This information was analysed by the teachers and the researchers, reflecting on the components of the PCK, possible changes, and the rationale behind their actions. The results show that teachers changed their beliefs and knowledge about the best methods and strategies to teach evolution, and about students’ learning obstacles and misconceptions on evolution. They realised how a review of their own practices promotes this transformation.     

Review of the Leaving Certificate biology examination papers (1999–2008) using Bloom’s taxonomy – an investigation of the cognitive demands of the examination

It is widely recognised that high-stakes assessment can significantly influence what is taught in the classroom. Many argue that high-stakes assessment results in a narrowed curriculum where students learn by rote rather than developing higher cognitive skills. This paper describes a study investigating the various cognitive objectives present from Bloom’s Taxonomy Educational Objectives on the Leaving Certificate biology examination. The study analysed examination papers from the past and current biology syllabuses. Analysis was also carried out to determine the marks being awarded to the different cognitive objectives. The findings show that the examination predominately includes questions that do not promote higher levels of thinking. The majority of the marks on the paper were allocated to the lower objectives of the taxonomy, suggesting students can rely on rote learning to succeed when undertaking the biology examination. This study strongly highlights how high-stake examinations have a narrow scope in terms of student achievement and shows how current biology examination procedures promote low-level learning. This low level of thinking promotes rote learning and regurgitation of facts, requiring little to no understanding of the topics. To prepare students for the working world, there needs to be a shift from only terminal exams to a mixed approach.     

Threshold concepts and the troublesome transition from GCSE to A-level: exploring students’ experiences in secondary school biology

Abstract

This paper draws on doctoral research exploring the lived experiences of secondary school students during their first year of A-level study, through the theoretical lens of the Threshold Concept Framework. A longitudinal design frame based on Interpretative Phenomenological Analysis is employed, thus providing an original use of this methodology in education research to address the paucity of inquiry exploring the difficulties experienced by students as they transition from the General Certificate in Secondary Education (GCSE) to A-level. In this context, I argue that students’ encounters with threshold concepts (TCs) are significant for them, posing a degree of cognitive and affective challenge which serves to exacerbate the difficulty of transition already caused by increased workload and pressure. The findings offer insights into students’ struggles adjusting to shifting identity and membership of communities further intensified by the integrative, discursive and transformative nature of TC acquisition. The longitudinal research design also surfaces positive aspects of growing awareness of the integrative power of TCs. Recommendations are made for further research involving students, teachers and academics to explore TCs in a range of other subjects and settings in secondary schools in the context of recent and significant changes to GCSE and A-level curricula.     

Examining high-school students’ overconfidence bias in biology exam: a focus on the effects of country and gender

Accurate, rational, and scientific decision making is now considered to be the most important skill in science education. Many studies have found that overconfidence bias is one of the cognitive biases hindering people from achieving such decision making. Gender and country play crucial roles in overconfidence bias. For instance, some particular cultures and genders tend to be more overconfident than others. However, whether or not the two variables interact to influence overconfidence bias also indirectly influences decision making, especially in the context of science education. The purpose of this study is to identify the effects of country and gender on performance, confidence, and overconfidence bias in the samples of Indonesian and Korean high-school students while doing on a biology exam. The twenty-one American Association for the Advancement of Science (AAAS) questions on the topics of genetics and evolution were administered to 297 Indonesian and 235 Korean high-school students, in their first and second years. Every question was featured with a question asking students how confident they are in answering the question correctly. The two-way Analysis of Variances (2-way ANOVA) test was used to answer the research questions. Based on the analyses, we found no significance interactional effects of gender and country in test scores. In contrast, we found a significant interactional effects in both confidence in genetics and evolution. Regarding overconfidence bias, for which that we merged both concepts, we found that country had a higher influence on students’ overconfidence bias than did gender. Additionally, we found the hard-easy effect phenomenon followed overconfidence bias phenomenon. The relationships between country, gender, science education, cognitive bias, and overconfidence bias are discussed. Suggestions for reducing overconfidence bias are also provided.     

What are the relative effects of reasoning ability and prior knowledge on biology achievement in expository and inquiry classes?

What factor(s) influence the likelihood a student will succeed in college biology? Some researchers have found the primary determinant to be the student's prior knowledge of biology, while others have found it to be reasoning ability. Perhaps the ability of these factors to predict achievement depends on the instructional method employed. Expository instruction focuses primarily on facts and concepts. Therefore, perhaps the best predictor of achievement in expository classes is domain-specific prior knowledge. Inquiry instruction focuses more on how science is done, i.e., on scientific processes; therefore, perhaps the best predictor in inquiry classes is reasoning ability. This study was designed to test these hypotheses. Students enrolled in a nonmajors community college biology course were pretested to determine reasoning ability and prior knowledge. The number of previous biology courses was also recorded as an indicator of prior knowledge. After a semester of either expository or inquiry (learning-cycle) instruction, students took a comprehensive final examination. Reasoning ability but not prior knowledge or number of previous biology courses accounted for a significant amount of variance in final examination score in both instructional methods and with semester examination and quiz scores in inquiry classes. This suggests that reasoning ability limits achievement more than prior knowledge among these biology students, whether they are enrolled in expository or inquiry classes. Reasoning ability explained more of the variance in final examination scores for students enrolled in expository classes (18.8%) than in inquiry classes (7.2%). The reason for this is not clear, but significant improvements in reasoning were found in the inquiry but not in the expository classes. These improvements were accompanied by significant differences in achievement in the inquiry classes. Perhaps the reasoning improvement facilitated the better and more equal achievement for students in the inquiry classes, thus reducing the correlation between initial reasoning ability and final achievement. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 89-103, 1998.     

“What if we were in a test tube?” Students’ gendered meaning making during a biology lesson about the basic facts of the human genitals

This paper explores what happens in the encounters between presentations of “basic facts” about the human genitals and 15-year-old students during a biology lesson in a Swedish secondary school. In this paper, meaning making was approached as relational, context-dependent and continually transacted. For this reason the analysis was conducted through a series of close readings of situations where students interacted with each other and the teacher in opening up gaps about alternative ways of discussing gender. Drawing on Foucault’s theories about the inclusion and exclusion of knowledge and the subsequent work of Butler and other feminist researchers, the paper illuminates what gendered relations remain tacit in the conversation. It then illustrates possible ways in which these tacit gendered meanings could be made overt and discussed with the students when making meaning about the human genitals. The paper also shows how the ways in which human genitals are transacted in the science classroom have importance for what kind of learning is made available to the students.