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Cognitive discourse during a group quiz activity in a blended learning organic chemistry course 有机化学混合学习小组测验活动中的认知话语
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-08-17 DOI: 10.1515/cti-2023-0007
Joy Ballard, Sujani K Gamage, Leyte L. Winfield, S. Mooring
Abstract Student-centered approaches are critical to improving outcomes in STEM courses. Collaborative learning, in particular, allows students to co-construct understanding of concepts and refine their skills in analyzing and applying information. For collaborative learning to be effective, groups must engage in productive dialogue. The work reported here characterizes the quality of dialogue during group quizzes in a first-semester organic chemistry course. The group quiz sessions were video and audio recorded. The recordings were transcribed and coded using the Interactive, Constructive, Active, Passive (ICAP) framework. The quiz prompts were analyzed using Marzano’s taxonomy. In this study, students within the group demonstrated varying degrees of interactional quality as defined by the ICAP framework. Our data also indicate that the level of constructive and interactive dialogue is highest and most consistent when prompts are at Marzano Level 3 or higher. Marzano Level 3 prompts required students to compare and contrast concepts or extend their understanding of concepts by developing an analogy. Any benefit derived from collaborative learning depends on the quality of dialogue during the group discussion. Implications of these results for research and teaching are offered.
摘要以学生为中心的方法对于提高STEM课程的成绩至关重要。合作学习尤其允许学生共同构建对概念的理解,并提高他们分析和应用信息的技能。为了使合作学习有效,小组必须进行富有成效的对话。本文报道的这项工作描述了有机化学第一学期小组测验中对话的质量。小组测验是录像和录音的。录音采用互动、建构、主动、被动(ICAP)框架进行转录和编码。使用Marzano的分类法对测验提示进行了分析。在这项研究中,小组中的学生表现出了ICAP框架所定义的不同程度的互动质量。我们的数据还表明,当提示为Marzano 3级或更高时,建设性和互动性对话的水平最高,也最一致。Marzano Level 3提示要求学生比较和对比概念,或通过发展类比来扩展他们对概念的理解。合作学习的任何好处都取决于小组讨论期间对话的质量。这些结果对研究和教学具有启示意义。
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引用次数: 0
Supporting first-year students in learning molecular orbital theory through a digital learning unit 支持一年级学生通过数字学习单元学习分子轨道理论
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-08-17 DOI: 10.1515/cti-2022-0040
David Johannes Hauck, Andreas Steffen, I. Melle
Abstract A large number of chemistry students drop out of their studies, often because of high requirements for content knowledge. Quantum chemical models of atomic bonding such as molecular orbital (MO) theory are particularly challenging. We aimed to develop an intervention on MO theory based on the Computer-Supported Collaborative Learning framework. First, students work independently with interactive learning videos. Then, they create concept maps about core concepts of MO theory. In this paper, we present the evaluation of this intervention in terms of content knowledge, considering person-specific characteristics. Additionally, we compare three different treatment groups with varying materials and group arrangements, and prospective chemistry teachers with other first-year students. Our results show that students can answer single-choice questions well with the prior knowledge from their first-year chemistry course. Answering open-ended questions is more difficult. Nevertheless, they can improve significantly in both categories by working with the learning videos; creating concept maps does not lead to significant content knowledge changes. There are also no significant differences between the three treatment groups, or between teacher students and other chemistry freshmen. Regarding prior knowledge, differences depending on gender and school-leaving grades can be measured, whereas the choice of courses in school has no effect.
摘要大量化学专业的学生辍学,往往是因为对内容知识的要求很高。原子键合的量子化学模型,如分子轨道理论,特别具有挑战性。我们的目标是开发一个基于计算机支持的协作学习框架的MO理论干预。首先,学生通过互动学习视频独立学习。然后,他们创建了MO理论核心概念的概念图。在本文中,我们从内容知识的角度,考虑到个人的具体特征,对这种干预进行了评估。此外,我们比较了三个不同的治疗组,不同的材料和组安排,以及未来的化学老师和其他一年级学生。我们的研究结果表明,学生能够很好地利用一年级化学课程的先验知识回答单选题。回答开放式问题比较困难。尽管如此,通过使用学习视频,他们可以在这两个类别中都有显著的改进;创建概念图不会导致内容知识的显著变化。三个处理组之间,或师范生与其他化学新生之间也没有显著差异。关于先验知识,可以衡量不同性别和离校成绩的差异,而学校课程的选择没有影响。
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引用次数: 0
A safe-at-home benzoin condensation from imitation almond extract 一种安全的家用仿杏仁提取物中的安息香缩合物
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-08-03 DOI: 10.1515/cti-2023-0004
M. J. Bishop, Jon Vander Woude, Mike Bosscher
Abstract COVID-19 remote learning forced instructors to scramble for meaningful organic laboratory experiences safe enough to perform at home. While resources are available for laboratory experiments at home, organic synthesis suffers from issues involving safety, availabilities of reagents, difficulties measuring reagents, and difficulties analyzing products. We report a new take on the classic benzoin condensation using safe and commonly available reagents, capable of being setup with commonly available kitchen materials, and displaying visible and distinctive product. This experiment is aimed at reinforcing concepts of carbonyl chemistry in the undergraduate organic chemistry laboratory.
COVID-19远程学习迫使教师争夺有意义的有机实验室体验,这些体验足够安全,可以在家中进行。虽然国内有足够的实验室实验资源,但有机合成存在安全性、试剂的可用性、测量试剂的困难以及分析产品的困难等问题。我们报告了一个新的采取经典的苯甲酰冷凝使用安全和常用的试剂,能够设置与常用的厨房材料,并显示可见和独特的产品。本实验旨在强化本科有机化学实验室中羰基化学的概念。
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引用次数: 0
Impact of cognitive abilities on performance in organic chemistry 认知能力对有机化学学习成绩的影响
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-08-01 DOI: 10.1515/cti-2023-0012
Sachin Nedungadi, Sunaina Shenoy
Abstract The purpose of this study was to observe the relationship between students’ cognitive abilities and their performance in organic chemistry. We were interested in measuring whether some cognitive composites were more predictive than others on organic chemistry performance, whether group differences existed between males and females, and whether group differences existed between students with above and below average cognitive abilities. For Study 1 and Study 2, our participants included 48 and 60 sophomore organic chemistry students respectively. We used the Woodcock-Johnson Test of Cognitive Abilities-IV to measure cognitive composites. ACS organic chemistry exam scores and scores on an organic chemistry concept inventory were used to measure student performance. We ran a correlational analysis between the cognitive composites and organic chemistry scores, and t-tests for group comparisons. For Study 1, we found a significant moderate correlation between long-term retrieval and organic chemistry scores. For Study 2, we found a significant small to moderate correlation between comprehension knowledge and short-term working memory, with organic chemistry scores. We did not find any significant gender differences, except on comprehension knowledge. The differences between above average and below average cognitive abilities were only seen in relation to the concept inventory and not ACS exam scores.
摘要本研究旨在观察学生的认知能力与有机化学成绩之间的关系。我们感兴趣的是测量一些认知复合物是否比其他认知复合物更能预测有机化学表现,男性和女性之间是否存在群体差异,以及认知能力高于平均水平和低于平均水平的学生之间是否存在组群差异。对于研究1和研究2,我们的参与者分别包括48名和60名有机化学大二学生。我们使用Woodcock-Johnson认知能力测试IV来测量认知复合物。ACS有机化学考试成绩和有机化学概念清单上的分数被用来衡量学生的表现。我们对认知复合物和有机化学得分之间进行了相关性分析,并对组间比较进行了t检验。在研究1中,我们发现长期检索与有机化学得分之间存在显著的中度相关性。在研究2中,我们发现理解知识和短期工作记忆与有机化学分数之间存在显著的小到中等相关性。除了在理解知识方面,我们没有发现任何显著的性别差异。高于平均水平和低于平均水平的认知能力之间的差异仅与概念清单有关,而与ACS考试成绩无关。
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引用次数: 0
Frontiers of research in chemistry education for the benefit of chemistry teachers 化学教育前沿研究,造福化学教师
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-07-26 DOI: 10.1515/cti-2023-0041
R. Blonder, S. Rap, R. Mamlok-Naaman
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引用次数: 0
The rise and fall of the phlogiston theory: a tool to explain the use of models in science education 燃素理论的兴衰:一个解释在科学教育中使用模型的工具
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-07-26 DOI: 10.1515/cti-2023-0025
R. Mamlok-Naaman
Abstract The phlogiston theory was established around 1700 and lasted for about one hundred years. According to the Phlogiston Theory, phlogiston is released during heating processes, and the remaining material becomes lighter. The demise of this theory started with Lavoisier’s new insights into the phenomena of chemical reactions in general and combustion in particular, as well as about the composition of air. The rise and fall of the Phlogiston theory is a good example to the process of the replacement of one theory by another, due to new facts and new discoveries. In addition, it stresses the advantages and limitations of scientific models and theories, as well as the nature of science. A brief program, planned for two lessons, was developed around the Phlogiston Theory, in the framework of teaching and learning the “Science: An Ever-Developing Entity” program. Semi-structured interviews with teachers and students were conducted after the completion of the Phlogiston topic. Based on the findings, it is suggested that the brief program, reached its goals. The students, who studied the program, learned more about the scientists – their curiosity and their boldness, as well as about the scientific endeavor, consisting of discoveries, models and theories.
摘要燃素学说建立于1700年前后,至今已有近百年的历史。根据Phlogiston理论,在加热过程中,炎素会释放出来,剩下的物质会变得更轻。这一理论的消亡始于拉瓦锡对一般化学反应现象,特别是燃烧现象,以及空气成分的新见解。Phlogiston理论的兴起和衰落是一个很好的例子,说明了由于新的事实和新的发现,一种理论被另一种理论取代的过程。此外,它还强调了科学模型和理论的优势和局限性,以及科学的本质。在教授和学习“科学:一个不断发展的实体”计划的框架内,围绕博士理论制定了一个简短的计划,共两节课。在完成Phlogiston专题后,对教师和学生进行了半结构化访谈。根据研究结果,提出了简要方案,达到了目标。学习该项目的学生们更多地了解了科学家——他们的好奇心和勇气,以及由发现、模型和理论组成的科学努力。
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引用次数: 0
ChemDive – a classroom planning tool for infusing Universal Design for Learning ChemDive -一个课堂规划工具,为学习注入通用设计
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-07-25 DOI: 10.1515/cti-2022-0039
Monika Holländer, I. Melle
Abstract The increasing diversity in todays’ classroom environment is a general challenge for modern societies and requires also for future chemistry teachers specific professional training. For that reason, the Universal Design for Learning (UDL) is part of our university’s master program. It is designed as a framework for an approach which also serves to make chemistry lessons more accessible. However, while implementing the UDL in the specific planning of chemistry lessons problems might often occur. Therefore, based on the UDL and on established approaches to lesson planning in chemistry education we have developed the planning tool ChemDive (Chemistry for Diversity) with different functions, allowing teachers to practice the effective planning of more accessible lessons. ChemDive is taught as part of a master’s degree seminar in preparation for a semester-long practical phase at school. We carried out the evaluation in chemistry teachers’ training in addition to the development of the tool. The study is designed as an intervention study with repeated measures at the beginning and the end of the seminar. Initial results of the quantitative evaluation (during the seminar; pre-post) of lesson planning show that students implement significantly more UDL elements after being taught the planning tool than they do without.
摘要当今课堂环境的日益多样化对现代社会来说是一个普遍的挑战,也需要对未来化学教师进行专门的专业培训。因此,通用学习设计(UDL)是我们大学硕士课程的一部分。它被设计为一种方法的框架,也有助于使化学课程更容易获得。然而,在化学课程的具体规划中实施UDL时,可能会经常出现问题。因此,基于UDL和化学教育中既定的课程规划方法,我们开发了具有不同功能的规划工具ChemDive(化学促进多样性),使教师能够实践更容易获得的课程的有效规划。ChemDive作为硕士学位研讨会的一部分进行教学,为学校为期一学期的实践阶段做准备。除了工具的开发外,我们还在化学教师的培训中进行了评估。该研究被设计为一项干预研究,在研讨会开始和结束时重复采取措施。课程规划的定量评估(研讨会期间;会前)的初步结果表明,学生在学习了规划工具后,实施的UDL元素明显多于没有学习工具的学生。
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引用次数: 0
Are you teaching “distillation” correctly in your chemistry classes? An educational reconstruction 你在化学课上教的“蒸馏”正确吗?教育重建
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-07-18 DOI: 10.1515/cti-2022-0034
Simone Abels, B. Koliander, T. Plotz
Abstract Distillation is often taught at secondary level in chemistry classes. There are, however, several pitfalls in teaching and learning the topic. First, there is not enough accessible research on students’ conceptions regarding distillation, which makes it difficult for teachers and teacher educators to teach accordingly in school or university. Second, the scientific explanation of distillation, especially the separation of liquid-liquid mixtures, is much more complex than represented in school books or other learning material. Third, teachers understandably rely on the representation in school books and other materials when teaching distillation, so that inappropriate concepts may be transferred to students. In this article, we follow the model of educational reconstruction and illustrate with reference to chemistry textbooks, school books, our own research results, and other studies on students’ conceptions the three pitfalls named above. Thus, this article aims to provide support for teachers and teacher educators to structure lessons on distillation based on scientifically appropriate information and with regard to students’ conceptions.
摘要化学课经常在中学阶段教授蒸馏。然而,在教授和学习这个话题时,有几个陷阱。首先,对学生关于升华的概念没有足够的可及性研究,这使得教师和教师教育者很难在学校或大学进行相应的教学。其次,对蒸馏的科学解释,特别是液-液混合物的分离,比学校书籍或其他学习材料中描述的要复杂得多。第三,教师在进行蒸馏教学时,可以理解地依赖于学校书籍和其他材料中的表现,这样不合适的概念可能会转移到学生身上。在本文中,我们遵循教育重建的模式,并参考化学教科书、学校书籍、我们自己的研究结果以及其他关于学生概念的研究来说明上述三个陷阱。因此,本文旨在为教师和教师教育工作者提供支持,以科学适当的信息为基础,结合学生的概念,构建关于蒸馏的课程。
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引用次数: 0
What makes representations good representations for science education? A teacher-oriented summary of significant findings and a practical guideline for the transfer into teaching 是什么让表征成为科学教育的良好表征?一份以教师为导向的重要发现总结,以及将其转化为教学的实用指南
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-07-17 DOI: 10.1515/cti-2022-0019
Büşra Tonyali, Mathias Ropohl, Julia Schwanewedel
Abstract Existing instructional materials for chemistry offer a huge range of different external representations that can be used by chemistry teachers to support students’ understanding of chemical concepts like the concept structure of matter. In science, different kinds of representations are usually combined forming multiple external representations. Examples are combinations of texts, pictures, figures, diagrams, graphs, tables, schemes etc. However, these multiple external representations often have problematic features and/or do not meet students’ subject-related learning needs. For example, many external representations do not take different representational levels into account and/or mix information on the macroscopic level with those from the submicroscopic level. Such representations have the potential to favor students’ misconceptions who often struggle with separating different representational levels. Therefore, it is important to highlight crucial characteristics of external representations that potentially facilitate students’ learning of chemical concepts at lower secondary schools (age group 10–14). When chemistry teachers consider and reflect crucial characteristics of representations and adapt existing external representations or develop new ones, these new representations can become powerful cognitive tools helping to make instruction in chemistry more effective and coherent. This article answers the question What makes representations good representations in science education? by describing features of effective learning with decisive characteristics of multiple external representations and highlighting these characteristics by means of concrete examples from chemistry learning. Finally, an online tool will be outlined that can help teachers to improve multiple external representations for use in chemistry classes.
现有的化学教学材料提供了大量不同的外部表征,化学教师可以利用这些表征来支持学生对物质概念结构等化学概念的理解。在科学中,不同种类的表征通常组合在一起,形成多个外部表征。例如文本、图片、数字、图表、图形、表格、方案等的组合。然而,这些多重外部表征往往有问题的特征和/或不满足学生与学科相关的学习需求。例如,许多外部表征没有考虑到不同的表征层次和/或将宏观层面的信息与亚微观层面的信息混合在一起。这样的表征有可能有利于学生的误解,他们往往难以区分不同的表征水平。因此,重要的是要强调外部表征的关键特征,这些特征可能有助于学生在初中(10-14岁)学习化学概念。当化学教师考虑和反映表征的关键特征,并适应现有的外部表征或开发新的表征时,这些新的表征可以成为强大的认知工具,有助于使化学教学更有效和连贯。本文回答了在科学教育中是什么使表征成为好的表征?通过用多重外在表征的决定性特征来描述有效学习的特征,并通过化学学习的具体实例来突出这些特征。最后,将概述一个在线工具,它可以帮助教师改进化学课堂上使用的多种外部表示。
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引用次数: 0
A new online resource for chemical safety and green chemistry in science education 科学教育中的化学安全与绿色化学在线资源
Q2 EDUCATION, SCIENTIFIC DISCIPLINES Pub Date : 2023-07-13 DOI: 10.1515/cti-2022-0031
S. Tveit, Karoline Faegri
Abstract Science and chemistry teachers often feel that they have insufficient knowledge about the legal requirements concerning proper handling of chemicals. To help teachers and technicians, we have developed an online resource with information and tools for the various aspects of chemical safety, such as legislation, risk assessment, storage, labelling and waste handling, including a framework for routines and training for staff and students. Additionally, the resource introduces the concept of green chemistry, an emerging field within chemistry education, and provides examples on how teachers could work with green chemistry principles in the science and chemistry classroom. The aim is that this extensive online material, covering the most important aspects of health, safety and environmental work in school science education, can serve as a useful resource for school leaders, teachers, technicians and science teacher educators in their work with these issues. The resource was developed by partners from the Universities of Helsinki, Ljubljana, Oslo, and Stockholm and co-funded by the Erasmus+ program of the European Union. The content is published in five languages and is freely available at https://chesse.org.
摘要科学和化学教师经常觉得他们对正确处理化学品的法律要求了解不足。为了帮助教师和技术人员,我们开发了一个在线资源,其中包含化学品安全各个方面的信息和工具,如立法、风险评估、储存、标签和废物处理,包括员工和学生的常规和培训框架。此外,该资源介绍了绿色化学的概念,这是化学教育中的一个新兴领域,并提供了教师如何在科学和化学课堂上运用绿色化学原理的例子。其目的是,这些广泛的在线材料涵盖了学校科学教育中健康、安全和环境工作的最重要方面,可以作为学校领导、教师、技术人员和科学教师教育工作者处理这些问题的有用资源。该资源由赫尔辛基大学、卢布尔雅那大学、奥斯陆大学和斯德哥尔摩大学的合作伙伴开发,并由欧盟伊拉斯谟+项目共同资助。内容以五种语言出版,可在https://chesse.org.
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引用次数: 0
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Chemistry Teacher International : best practices in chemistry education
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