College students' perceptions of the theory of evolution

Although a well‐corroborated scientific theory, the theory of evolution has continued to cause dilemmas for some individuals who have not easily been able to accommodate the concepts of this theory within their “cognitive culture.” The reason lies in the overlap of some ideas that the theory advocates with other social, epistemological, and religious beliefs. This study describes how 11 college biology students who completed a course on the theory of evolution perceive the relationship among their epistemological beliefs about science, their beliefs about religion, and their perception of nature and causality and their position regarding the theory of evolution. It also compares the different positions of the students to that of the course instructor. Questionnaires and semistructured interviews were used to collect data. Qualitative methods were used to analyze the data and identify the various positions of the students and course instructor. The students' positions ranged from complete acceptance to complete rejection of the theory of evolution. The results suggest that students' personal beliefs should not be dismissed or underestimated when teaching the theory of evolution. © 2008 Wiley Periodicals, Inc. J Res Sci Teach 45: 395–419, 2008     

Cross‐cultural epistemological orientations to socioscientific issues

The purpose of this investigation was to examine, from a cross‐cultural perspective, students' epistemological patterns of reasoning about socioscientific issues (SSI), and to identify potential interactions of cultural and scientific identity. Mediating factors associated with students' argumentation and discourse about SSI, as well as the public's understanding of science, has been identified as an important area of investigation in the field of science education. This mixed‐methods design included over 300 students from Jamaica, South Africa, Sweden, Taiwan, and the United States. Students responded to instruments designed to assess their epistemological conceptualizations and justifications related to distributive justice, allocation of scarce medical resources, and epistemological beliefs over five dimensions related to scientific knowledge. Four iterations of a coding scheme produced over 97% inter‐rater agreement for four independent coders. Results indicate there is a consistent trend toward epistemological congruity across cultures within inductively derived themes of: (1) Fairness; (2) Pragmatism; (3) Emotive Reasoning; (4) Utility; and (5) Theological Issues. Moreover, there were no discernable differences in terms of how students from these countries presented their beliefs on the sub‐categories of each of the five major categories. It appears that students displayed a high degree of congruence with respect to how they frame their reasoning on this SSI as well as their justifications for their epistemological beliefs. There were statistically significant differences regarding the ability to raise scientifically relevant questions among countries. Commonalities as well as distinguishing characteristics in epistemological orientations are compared and contrasted and connections to a model of socioscientific reasoning with implications for research and pedagogy are discussed. © 2013 Wiley Periodicals, Inc. J Res Sci Teach 50:251–283, 2013     

用“理想实验”帮助学生理解“测不准原理”

引用理想实验可以加深学生对抽象理论的理解,运用理想实验可以培养学生分析问题和解决问题的能力。     

Effects of active‐learning experiences on achievement,attitudes, and behaviors in high school biology

Active‐learning labs for two topics in high school biology were developed through the collaboration of high school teachers and university faculty and staff and were administered to 408 high school students in six classrooms. The content of instruction and testing was guided by State of Texas science objectives. Detailed teacher records describing daily classroom activities were used to operationalize two types of instruction: active learning, which used the labs; and traditional, which used the teaching resources ordinarily available to the teacher. Teacher records indicated that they used less independent work and fewer worksheets, and more collaborative and lab‐based activities, with active‐learning labs compared to traditional instruction. In‐class test data show that students gained significantly more content knowledge and knowledge of process skills using the labs compared to traditional instruction. Questionnaire data revealed that students perceived greater learning gains after completing the labs compared to covering the same content through traditional methods. An independent questionnaire administered to a larger sample of teachers who used the lab‐based curriculum indicated that they perceived changing their behaviors as intended by the student‐centered principles of the labs. The major implication of this study is that active‐learning–based laboratory units designed and developed collaboratively by high school teachers and university faculty, and then used by high school teachers in their classrooms, can lead to increased use of student‐centered instructional practices as well as enhanced content knowledge and process learning for students. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 960–979, 2007     

School district-provided supports to enhance sexual health education among middle and high school health education teachers

Schools support teachers in their professional learning, just as teachers support students in their learning. To accomplish this, schools can provide support systems that enhance teachers’ knowledge, comfort, and instructional skills. This study examined the impact of two district-provided supports (curriculum and professional development) on sexual health instruction among middle and high school health education teachers. Data were abstracted and analyzed using inductive coding from 24 teacher interviews (2015–2016). Findings illustrate outcomes from both curriculum and PD on teachers’ self-reported knowledge, comfort, and skills. The district-provided supports appeared to contribute to improved teachers’ self-efficacy in delivering sexual health education.     

Factors associated with middle school students' perceptions of the quality of school-based sexual health education

This paper examines factors associated with middle school students' perceptions of the quality of the sexual health education (SHE) they received at school. Participants were 478 predominately White young people (256 girls, 222 boys) in grades 6–8 who completed a survey assessing their demographic characteristics; dating and sexual experience; and perceptions of the content, delivery and quality of the SHE they had received. Boys and students in a lower grade and with less sexual experience rated the quality of their SHE more positively. After accounting for student characteristics, students who more strongly agreed that their SHE matched their interests and covered sexual health topics more adequately, as well as who viewed their teacher as being more comfortable talking about sexual topics and doing a better job answering questions, reported higher quality SHE. Students' perceptions of the adequacy of coverage of 10 sexual health topics were also positively correlated with their reports of higher quality SHE, although only two topics (correct names for genitals and puberty/physical development) contributed uniquely to the prediction of this variable. These results reinforce the need for a comprehensive SHE curriculum as well as adequate preparation of teachers if SHE is to be engaging to students.     

A method for analyzing the coherence of high school biology textbooks

Because textbooks have the potential to be powerful catalysts for improving science teaching and learning, having reliable methods for analyzing important textbook features, such as their coherence, is essential. This study reports on the development of a method in which trained reviewers, following a set of guidelines defining the ideas to be learned and connections among those ideas drawn from relevant maps published by the American Association for the Advancement of Science in the Atlas of Science Literacy (2001), were able to analyze the degree to which four widely used high school biology textbooks provided students and teachers with a coherent account of the important topic of matter and energy transformations in living systems. The study method was found to produce consistent results across reviewers and textbooks and can serve those who evaluate, design, and use science curriculum materials. This work represents an important first step in meeting the need for methods to measure, characterize, and, ultimately, to improve textbook coherence. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 47: 47–70, 2010     

Contextualizing instruction: Leveraging students' prior knowledge and experiences to foster understanding of middle school science

Contextualizing science instruction involves utilizing students' prior knowledge and everyday experiences as a catalyst for understanding challenging science concepts. This study of two middle school science classrooms examined how students utilized the contextualizing aspects of project‐based instruction and its relationship to their science learning. Observations of focus students' participation during instruction were described in terms of a contextualizing score for their use of the project features to support their learning. Pre/posttests were administered and students' final artifacts were collected and evaluated. The results of these assessments were compared with students' contextualizing scores, demonstrating a strong positive correlation between them. These findings provide evidence to support claims of contextualizing instruction as a means to facilitate student learning, and point toward future consideration of this instructional method in broader research studies and the design of science learning environments. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 45: 79–100, 2008     

Students' environmental NOS views,compassion, intent,and action: Impact of place‐based socioscientific issues instruction

Preparing students to achieve the lofty goal of functional scientific literacy entails addressing the normative and non‐normative facets of socioscientific issues (SSI) such as scientific processes, the nature of science (NOS) and diverse sociocultural perspectives. SSI instructional approaches have demonstrated some efficacy for promoting students' NOS views, compassion for others, and decision making. However, extant investigations appear to neglect fully engaging students through authentic SSI in several ways. These include: (i) providing SSI instruction through classroom approaches that are divorced from students' lived experiences; (ii) demonstrating a contextual misalignment between SSI and NOS (particularly evident in NOS assessments); and (iii) framing decision making and position taking analogously—with the latter being an unreliable indicator of how people truly act. The significance of the convergent parallel mixed‐methods investigation reported here is how it responds to these shortcomings through exploring how place‐based SSI instruction focused on the contentious environmental issue of wolf reintroduction in the Greater Yellowstone Area impacted sixty secondary students' NOS views, compassion toward those impacted by contentious environmental issues, and pro‐environmental intent. Moreover, this investigation explores how those perspectives associate with the students' pro‐environmental action of donating to a Yellowstone environmental organization. Results demonstrate that the students' NOS views became significantly more accurate and contextualized, with moderate to large effect, through the place‐based SSI instruction. Through that instruction, the students also exhibited significant gains in their compassion for nature and people impacted by contentious environmental issues and pro‐environmental intent. Further analyses showed that donating students developed and demonstrated significantly more robust and contextualized NOS views, compassion for people and nature impacted by contentious environmental issues, and pro‐environmental intent than their nondonating counterparts. Pedagogical implications include how place‐based learning in authentic settings could better prepare students to understand NOS, become socioculturally aware, and engage SSI across a variety of contexts.     

Using computer animation and illustration activities to improve high school students' achievement in molecular genetics

Our main goal in this study was to determine whether the use of computer animation and illustration activities in high school can contribute to student achievement in molecular genetics. Three comparable groups of eleventh‐ and twelfth‐grade students participated: the control group (116 students) was taught in the traditional lecture format, whereas the experimental groups received instructions that integrated a computer animation (61 students) or illustration (71 students) activities. We used three research instruments: a multiple‐choice questionnaire; an open‐ended, written questionnaire; and personal interviews. Five of the multiple‐choice questions were also given to students before they received their genetics instruction (pretest). We found that students who participate in the experimental groups improved their knowledge in molecular genetics compared with the control group. However, the open‐ended questions revealed that the computer animation activity was significantly more effective than the illustration activity. On the basis of these findings, we conclude that it is advisable to use computer animations in molecular genetics, especially when teaching about dynamic processes; however, engaging students in illustration activities can still improve their achievement in comparison to traditional instruction. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 45: 273–292, 2008     

Gender ratios in high school science departments: The effect of percent female faculty on multiple dimensions of students' science identities

To examine how school characteristics are tied to science and engineering views and aspirations of students who are underrepresented in science and engineering fields, this mixed‐methods study explores relationships between aspects of students' science identities, and the representation of women among high school science teachers. Quantitative analyses tested the hypothesis that percent female faculty would have a positive effect on girls' science interests, and perceptions in particular, given the potentially greater availability of women role models. Findings indicate that percent female science faculty does not have an effect on a range of science measures for both male and female students, including the ways in which they understand scientific practice, their science self‐concept, and their interest in science‐related college majors. As qualitative data demonstrate, this could reflect practical constraints at schools where female faculty are concentrated and narrow perceptions of science teachers and “real” science. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 980–1009, 2007     

Motivation in high school science students: A comparison of gender differences in life,physical, and earth science classes

The aims of this study were to examine self‐efficacy and other motivation variables among high school science students (n = 502); to determine the degree to which each of the four hypothesized sources of self‐efficacy makes an independent contribution to students' science self‐efficacy beliefs; to examine possible differences between life, physical, and Earth science classes; and to investigate patterns of gender differences that may vary among the fields of science. In Earth science classes, girls earned higher grades and reported stronger science self‐efficacy. In life science classes, girls earned higher grades but did not report stronger self‐efficacy, and did report higher science anxiety. In physical science, there were no gender differences in grades or self‐efficacy, but girls again reported higher levels of science anxiety. For boys across science fields, science self‐efficacy significantly predicted course grades and mastery experiences was the only significant predictor of self‐efficacy. For girls, self‐efficacy was also the strongest predictor of science grade across fields. Mastery experiences significantly predicted self‐efficacy in Earth science for girls, but social persuasions, vicarious experiences, and physiological states were better predictors of science self‐efficacy in life and physical science classes. Results support (Bandura, A., 1997) hypothesized sources of self‐efficacy, previous research findings on self‐efficacy in the domain of science, and validate the suggestion made by Lau and Roeser (2002) to disaggregate data by science field. © 2008 Wiley Periodicals, Inc. J Res Sci Teach 45: 955–970, 2008     

Coherence,contradiction, and the development of school science identities

This study demonstrates the potential for collaborative research among participants in local settings to effect positive change in urban settings characterized by diversity. It describes an interpretive case study of a racially, ethnically, and socioeconomically diverse eighth grade science classroom in an urban magnet school in order to explore why some of the students did not achieve at high levels and identify with school science although they were both interested in and knowledgeable about science. The results of this study indicated that structural issues such as the school's selection process, the discourses perpetuated by teachers, administrators, and peers regarding “who belongs” at the school, and negative stereotype threat posed obstacles for students by highlighting rather than mitigating the inequalities in students' educational backgrounds. We explore how a methodology based on the use of cogenerative dialogues provided some guidance to teachers wishing to alter structures in their classrooms to be more conducive to all of their students developing identities associated with school science. Based on the data analysis, we also argue that a perspective on classrooms as communities of practice in which learning is socially situated rather than as forums for competitive displays, and a view of students as valued contributors rather than as recipients of knowledge, could address some of the obstacles. Recommendations include a reduced emphasis on standardized tasks and hierarchies, soliciting unique student contributions, and encouraging learning through peripheral participation, thereby enabling students to earn social capital in the classroom. © 2010 Wiley Periodicals, Inc. J Res Sci Teach 47: 1209–1228, 2010     

Sexual behaviour and interest in using a sexual health mobile app to help improve and manage college students' sexual health

Many US college students are reported to engage in risky sexual behaviour. Smartphone applications are a popular way to provide users with information in real time. We explored the potential for mobile technology to be used in promoting the sexual health of college students. Using findings from an online survey among a random sample of 5000 college students (15% response), we examined sexual behaviours and interest in a sexual health application in January 2012. The majority of students were female (73%) and owned a smartphone (74%). Twenty-nine per cent currently used health-related applications on their phone and 67% reported interest in using a free application that could improve/manage their sexual health. Interest in use varied based on gender, race/ethnicity, sexual orientation, having an unintended pregnancy, sexually transmitted infection (STI) testing, smartphone ownership and past application use. The top most useful features for women included a period tracker (46%), birth control reminder (43%) and STI and pregnancy symptom checker (30%). Women were more likely to be interested in using the application compared with men and those engaging in more sexual activity were more likely to be interested as compared with those engaging in less sexual activity. The evaluation of mobile technology to promote healthy sexuality among college students is warranted.     

高中学生生物实验设计能力的培养

生物学是一门实验科学,学生生物实验设计能力的培养和提高,有助于学生获取及巩固知识,激发学习兴趣．培养创新能力,提高科学素养．结合中学生物学教学实践,从研究经典实验、加强实验实践、鼓励创新、强化训练、交流点拨等方面．谈高中生生物学实验设计能力的培养．     

初中生物学课后作业有效设计的思考

布置并指导完成适当的课后作业是初中生物课教学过程的重要环节.课后作业过程是学生学习成长的历程,是理论联系实际,关注生活,关注生产和社会实际的重要途径;也是培养学生学习兴趣,发展创造性思维,学习科学探究方法,形成实践技能的重要形式.对贯彻新课程理念,树立新的作业观,努力提高初中生物课后作业设计的有效性,进行了有益的探索与实践,取得了良好的效果.     

Using memes and memetic processes to explain social and conceptual influences on student understanding about complex socio‐scientific issues

This study investigated seventh grade learners' decision making about genetic engineering concepts and applications. A social network analyses supported by technology tracked changes in student understanding with a focus on social and conceptual influences. Results indicated that several social and conceptual mechanisms potentially affected how and why ideas were taken up in the learning system of the classroom. Mechanisms included copying or memetic processes such as “do as the smart students do” and friendship selection. Study outcomes are compared with the broader literature on memes and memetic processes to reveal general evolutionary ideas such as the development of prestige, identity versus problem‐solving strategies, extended phenotypes, and memeplexes. Educational implications for this research are also addressed. © 2008 Wiley Periodicals, Inc. J Res Sci Teach 45: 900–921, 2008