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     

A simple e-mail mechanism to enhance reflection, independence, and communication in young researchers

Providing undergraduates with mentored research experiences is a critical component of contemporary undergraduate science education. Although the benefits of undergraduate research experiences are apparent, the methods for mentoring young scientists as they first begin navigating the research lab environment are reinvented in labs all over the world. Students come to research labs with varied skills, motivations, needs, and dispositions, placing each student and mentor in a unique relationship. How can we help students become aware of their own intellectual progress? How can we encourage our students to take initial steps toward independent investigation? When do we need to let setbacks happen? We have developed a simple mechanism to address these common problems. Each week, students in our labs answer a series of five questions by e-mail that improve lab communication and help students develop into mature scientists without taxing an instructor's already busy schedule. Our observations, experiences, and student feedback indicate that this approach is a useful mechanism to help faculty who mentor young scientists in the research lab.     

Aligning goals, assessments, and activities: an approach to teaching PCR and gel electrophoresis

Polymerase chain reaction (PCR) and gel electrophoresis have become common techniques used in undergraduate molecular and cell biology labs. Although students enjoy learning these techniques, they often cannot fully comprehend and analyze the outcomes of their experiments because of a disconnect between concepts taught in lecture and experiments done in lab. Here we report the development and implementation of novel exercises that integrate the biological concepts of DNA structure and replication with the techniques of PCR and gel electrophoresis. Learning goals were defined based on concepts taught throughout the cell biology lab course and learning objectives specific to the PCR and gel electrophoresis lab. Exercises developed to promote critical thinking and target the underlying concepts of PCR, primer design, gel analysis, and troubleshooting were incorporated into an existing lab unit based on the detection of genetically modified organisms. Evaluative assessments for each exercise were aligned with the learning goals and used to measure student learning achievements. Our analysis found that the exercises were effective in enhancing student understanding of these concepts as shown by student performance across all learning goals. The new materials were particularly helpful in acquiring relevant knowledge, fostering critical-thinking skills, and uncovering prevalent misconceptions.     

Are Virtual Labs as Effective as Hands-on Labs for Undergraduate Physics? A Comparative Study at Two Major Universities

Most physics professors would agree that the lab experiences students have in introductory physics are central to the learning of the concepts in the course. It is also true that these physics labs require time and money for upkeep, not to mention the hours spent setting up and taking down labs. Virtual physics lab experiences can provide an alternative or supplement to these traditional hands-on labs. However, physics professors may be very hesitant to give up the hands-on labs, which have been such a central part of their courses, for a more cost and time-saving virtual alternative. Thus, it is important to investigate how the learning from these virtual experiences compares to that acquired through a hands-on experience. This study evaluated a comprehensive set of virtual labs for introductory level college physics courses and compared them to a hands-on physics lab experience. Each of the virtual labs contains everything a student needs to conduct a physics laboratory experiment, including: objectives, background theory, 3D simulation, brief video, data collection tools, pre- and postlab questions, and postlab quiz. This research was conducted with 224 students from two large universities and investigated the learning that occurred with students using the virtual labs either in a lab setting or as a supplement to hands-on labs versus a control group of students using the traditional hands-on labs only. Findings from both university settings showed the virtual labs to be as effective as the traditional hands-on physics labs.     

Alternation of generations and experimental design: a guided-inquiry lab exploring the nature of the her1 developmental mutant of Ceratopteris richardii (C-Fern)

Inquiry-based labs have been shown to greatly increase student participation and learning within the biological sciences. One challenge is to develop effective lab exercises within the constraints of large introductory labs. We have designed a lab for first-year biology majors to address two primary goals: to provide effective learning of the unique aspects of the plant life cycle and to gain a practical knowledge of experimental design. An additional goal was to engage students regardless of their biology background. In our experience, plant biology, and the plant life cycle in particular, present a pedagogical challenge because of negative student attitudes and lack of experience with this topic. This lab uses the fern Ceratopteris richardii (C-Fern), a model system for teaching and research that is particularly useful for illustrating alternation of generations. This lab does not simply present the stages of the life cycle; it also uses knowledge of alternation of generations as a starting point for characterizing the her1 mutation that affects gametophyte sexual development. Students develop hypotheses, arrive at an appropriate experimental design, and carry out a guided inquiry on the mechanism underlying the her1 mutation. Quantitative assessment of student learning and attitudes demonstrate that this lab achieves the desired goals.     

Getting real: the authenticity of remote labs and simulations for science learning

Teachers use remote labs and simulations to augment or even replace hands-on science learning. We compared undergraduate students’ experiences with a remote lab and a simulation to investigate beliefs about and learning from the interactions. Although learning occurred in both groups, students were more deeply engaged while performing the remote lab. Remote lab users felt and behaved as though they completed a real scientific experiment. We also examined whether realistic visualizations improved the psychological and learning experiences for each lab. Students who watched live video of the device collecting their data in the remote lab felt most engaged with the task, suggesting that it is the combination of the realistic lab and realistic video that was of the greatest benefit.     

The Python Project: A Unique Model for Extending Research Opportunities to Undergraduate Students

Undergraduate science education curricula are traditionally composed of didactic instruction with a small number of laboratory courses that provide introductory training in research techniques. Research on learning methodologies suggests this model is relatively ineffective, whereas participation in independent research projects promotes enhanced knowledge acquisition and improves retention of students in science. However, availability of faculty mentors and limited departmental budgets prevent the majority of students from participating in research. A need therefore exists for this important component in undergraduate education in both small and large university settings. A course was designed to provide students with the opportunity to engage in a research project in a classroom setting. Importantly, the course collaborates with a sponsor''s laboratory, producing a symbiotic relationship between the classroom and the laboratory and an evolving course curriculum. Students conduct a novel gene expression study, with their collective data being relevant to the ongoing research project in the sponsor''s lab. The success of this course was assessed based on the quality of the data produced by the students, student perception data, student learning gains, and on whether the course promoted interest in and preparation for careers in science. In this paper, we describe the strategies and outcomes of this course, which represents a model for efficiently providing research opportunities to undergraduates.     

A Further Characterization of Empirical Research Related to Learning Outcome Achievement in Remote and Virtual Science Labs

This paper further characterizes recently reviewed literature related to student learning outcome achievement in non-traditional (virtual and remote) versus traditional (hands-on) science labs, as well as factors to consider when evaluating the state and progress of research in this field as a whole. Current research is characterized according to (1) participant nationality and culture, (2) participant education level, (3) participant demography, (4) scientific discipline, and (5) research methodology, which could provide avenues for further research and useful dialog regarding the measurement and interpretation of data related to student learning outcome achievement in, and thus the efficacy of, non-traditional versus traditional science labs. Current research is also characterized by (6) research publication media and (7) availability of non-traditional labs used, which demonstrate some of the obstacles to progress and consensus in this research field.     

A Study of Rubisco through Western Blotting and Tissue Printing Techniques

We describe a laboratory exercise developed for a cell biology course for second-year undergraduate biology majors. It was designed to introduce undergraduates to the basic molecular biology techniques of Western blotting and immunodetection coupled with the technique of tissue printing in detecting the presence, relative abundance, and distribution of ribulose-1,5-bisphosphate carboxylase in various plant materials. Pre- and postlab surveys indicated significant postlab gains in student understanding of all three lab techniques and relevant lecture topics. Additional postlab survey questions on student perception of the lab modules suggested that the laboratory exercises successfully met a series of pedagogical goals set by the instructors. The combination of these techniques provided a basis for quantitative and qualitative (visual) analysis of a biologically important enzyme and can be applied or modified readily to study other proteins and biological molecules in lab exercises for an introductory cell biology course or molecular biology course.     

论新形势下高校实验室文化的建设

论述了加强高校实验室文化建设的重要性,以及相关理论、方法和途径,从而为充分发挥实验室的作用,推进实验室建设与管理,实验教学,实验教学改革,仪器设备开发利用等工作,打下一定的思想基础。     

Learning from the apprentice: an account of action research practice in a university department

An action research project, managed by a graduate student, resulted in the development of an academic website as an effective internal and external communication tool. The main focus of the investigation was to uncover the tacit knowledge held by staff in the Department of Management Communication through a series of in-depth interviews, a focus group, and informal conversations to facilitate the development of a website which effectively captured this knowledge. The cyclical nature of the action research methodology provided the flexibility to ensure that issues could be addressed as they arose; although the relative unfamiliarity of staff with action research methodologies created other barriers to be overcome. The key outcome for the staff was that they became aware of the extent of the tacit knowledge and resources available in the department; they valued these, and they utilised them effectively. The research highlights the different learning outcomes experienced by the student researcher, supervisors and departmental colleagues.     

近代物理实验室的立体化发展探索

为了提高近代物理实验室对本科实践创新能力培养的支持能力,探索通过利用科研资源以优化实验室条件、发展专题实验以实现交叉学科联合训练、提炼主题训练项目以实现工程创新培训支撑,从而实现实验室在广度和深度方向的立体化发展。实验室在内容结构上将拥有基础性实验、研究型专题实验和主题训练实验等模块和项目,在服务对像上从本科生拓展到工程技术人员,从功能和能力上将从近代物理基础实验训练支撑提高到具备多层次基础交叉联合训练和工程技术创新培训支撑能力。这种教学实验室立体化的发展思路,对于研究如何通过教学实验室的条件改善和角色转换、满足新时期条件下的高素质人才培养需要具有很好的借鉴意义。     

基于WinCC Web Navigator的PLC远程实验室设计

论文依托高校PLC实验室建设项目,设计与实现满足教学与科研需求的基于WinCC Web Navi-gator的PLC远程实验室系统。该系统较好地融合和运用了计算机自动控制技术、网络通信技术、监控技术、多媒体技术、网络数据库技术,具有重要的现实意义。论文着重研究和讨论了远程实验系统硬件和软件结构设计以及远程实验室网站的设计与实现。     

A Comprehensive Faculty,Staff, and Student Training Program Enhances Student Perceptions of a Course-Based Research Experience at a Two-Year Institution

Early research experiences must be made available to all undergraduate students, including those at 2-yr institutions who account for nearly half of America''s college students. We report on barriers unique to 2-yr institutions that preclude the success of an early course-based undergraduate research experience (CURE). Using a randomized study design, we evaluated a CURE in equivalent introductory biology courses at a 4-yr institution and a 2-yr institution within the same geographic region. We found that these student populations developed dramatically different impressions of the experience. Students at the 4-yr institution enjoyed the CURE significantly more than the traditional labs. However, students at the 2-yr institution enjoyed the traditional labs significantly more, even though the CURE successfully produced targeted learning gains. On the basis of course evaluations, we enhanced instructor, student, and support staff training and reevaluated this CURE at a different campus of the same 2-yr institution. This time, the students reported that they enjoyed the research experience significantly more than the traditional labs. We conclude that early research experiences can succeed at 2-yr institutions, provided that a comprehensive implementation strategy targeting instructor, student, and support staff training is in place.     

Peer mentoring among doctoral students of science and engineering in Taiwan

This study describes the peer mentoring experience from doctoral student mentors?? point of view. Twelve science and engineering doctoral students participated in this phenomenology study. The findings suggest doctoral peer mentors served instrumental, psychosocial, buffering, and liaison roles; they passed on their social, professional, and academic knowledge to their mentees and tried to assist them in adapting to the culture of the lab and academia. The study identified a variety of factors that influenced their attitudes and behaviors as peer mentors and concluded this system would be beneficial to the learning and development of both individual students and lab teams. The aims of this study were threefold: first, to identify the importance and necessity of peer mentoring systems as part of the experience of working in labs in graduate school; second, to ascertain which interactions and factors in the peer mentoring relationship benefitted both peer mentors and peer mentees; and third, to explore what might constitute best practices in the peer mentoring relationship.     

Factors influencing success in introductory college chemistry

Previous research has found a wide range of predictors of student performance in introductory college chemistry. These predictors are associated with both the students' backgrounds and their high school learning experiences. The purpose of this research study was to examine the link between high school chemistry pedagogical experiences and performance in introductory college chemistry while accounting for individual educational and demographic differences. The researchers surveyed 1531 students enrolled in first‐semester introductory college chemistry courses for science and engineering majors at 12 different U.S. colleges and universities. Using multiple regression analysis, the researchers uncovered several interesting high school pedagogical experiences that appeared to be linked with varying levels of performance in college chemistry. Most notably, the researchers found that repeating chemistry labs for understanding was associated with higher student grades, whereas overemphasis on lab procedure in high school chemistry was associated with lower grades in college. These results suggest that high school teachers' pedagogical choices may have a link to future student performance. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 987–1012, 2005     

A Pilot Study of the Effectiveness of Augmented Reality to Enhance the Use of Remote Labs in Electrical Engineering Education

Lab practices are an essential part of teaching in Engineering. However, traditional laboratory lessons developed in classroom labs (CL) must be adapted to teaching and learning strategies that go far beyond the common concept of e-learning, in the sense that completely virtualized distance education disconnects teachers and students from the real world, which can generate specific problems in laboratory classes. Current proposals of virtual labs (VL) and remote labs (RL) do not either cover new needs properly or contribute remarkable improvement to traditional labs??except that they favor distance training. Therefore, online teaching and learning in lab practices demand a further step beyond current VL and RL. This paper poses a new reality and new teaching/learning concepts in the field of lab practices in engineering. The developed augmented reality-based lab system (augmented remote lab, ARL) enables teachers and students to work remotely (Internet/intranet) in current CL, including virtual elements which interact with real ones. An educational experience was conducted to assess the developed ARL with the participation of a group of 10 teachers and another group of 20 students. Both groups have completed lab practices of the contents in the subjects Digital Systems and Robotics and Industrial Automation, which belong to the second year of the new degree in Electronic Engineering (adapted to the European Space for Higher Education). The labs were carried out by means of three different possibilities: CL, VL and ARL. After completion, both groups were asked to fill in some questionnaires aimed at measuring the improvement contributed by ARL relative to CL and VL. Except in some specific questions, the opinion of teachers and students was rather similar and positive regarding the use and possibilities of ARL. Although the results are still preliminary and need further study, seems to conclude that ARL remarkably improves the possibilities of current VL and RL. Furthermore, ARL can be concluded to allow further possibilities when used online than traditional laboratory lessons completed in CL.     

Insightful learning in the laboratory: Some experiences from 10 years of designing and using conceptual labs

This paper describes a series of projects on the design and implementation of ‘conceptual labs’ aimed at developing insightful learning, following work that began in 1994/1995. The main focus has been on courses in mechanics and electric circuit theory. The approach taken in designing these innovative curricula can be described as ‘design-based research’. A common feature in these learning environments is the use of technology as a tool to aid students’ inquiry. In addition, systematic variation, based on the theory of variation, has been introduced into the design of the assigned tasks. Results from conceptual inventories have demonstrated the success of conceptual labs. In the later projects, video recording was used to study students’ courses of action in labs. This paper describes how these studies have provided insights into conditions that are critical for learning and how these insights have helped the present author and his co-workers make further improvements to learning environments.     

Student Perceptions of the Value of Physics Laboratories

Science instruction literature provides us with goals for laboratory instruction and guidelines for designing and implementing science labs in the post‐secondary setting. How well are we doing in our attempt to provide a meaningful and positive learning experience for our students? This paper describes the results of a study to determine whether students view the lab component of second‐year physics courses at a mid‐sized Canadian University as a valuable learning experience. The results of a survey, administered over six semesters and completed by 168 students, indicate that students do acknowledge the value of labs. The results also identify the factors that influence the students’ perceptions of value in physics labs. This paper discusses the four factors found to have the greatest influence on students’ perceptions of the value of labs: (1) the pressure to complete an experiment within the allotted time, (2) the information provided on the lab instruction sheets, (3) the help provided by lab staff and graduate teaching assistants, and (4) the students’ level of preparedness.     

Student learning outcomes and attitudes when biotechnology lab partners are of different academic levels

The North Carolina State University Biotechnology Program offers laboratory-intensive courses to both undergraduate and graduate students. In "Manipulation and Expression of Recombinant DNA," students are separated into undergraduate and graduate sections for the laboratory, but not the lecture, component. Evidence has shown that students prefer pairing with someone of the same academic level. However, retention of main ideas in peer learning environments has been shown to be greater when partners have dissimilar abilities. Therefore, we tested the hypothesis that there will be enhanced student learning when lab partners are of different academic levels. We found that learning outcomes were met by both levels of student, regardless of pairing. Average undergraduate grades on every assessment method increased when undergraduates were paired with graduate students. Many of the average graduate student grades also increased modestly when graduate students were paired with undergraduates. Attitudes toward working with partners dramatically shifted toward favoring working with students of different academic levels. This work suggests that offering dual-level courses in which different-level partnerships are created does not inhibit learning by students of different academic levels. This format is useful for institutions that wish to offer "boutique" courses in which student enrollment may be low, but specialized equipment and faculty expertise are needed.