First-year Undergraduate Chemistry Research Articles

The impact of co-design-based formative assessment practices on preservice science teachers’ understanding of chemical concepts in a general chemistry laboratory course

Recently, scholars have suggested a co-design collaboration with instructors and students to effectively implement formative assessment (FA) practices because it ensures a high-quality design that considers users’ needs, values, and goals in a specific learning context. This study examines the effect of co-designed FA practices, in which preservice science teachers (PSTs) are co-designers of FA practices, on promoting their conceptual understanding of chemistry topics in a first-year undergraduate chemistry laboratory course. Sixteen randomly selected PSTs participated in the study for two consecutive semesters. At the end of the first semester, a co-design of the FA practices was developed collaboratively with the PSTs upon the approach of conjecture mapping. Then, the second semester was devoted to examining the impact of the co-design-based FA environment on overcoming the PSTs’ alternative conceptions regarding selected four chemistry laboratory topics: thermochemistry, chemical kinetics, chemical equilibrium, acids and bases. This study employed a conversion mixed research design. To evaluate the co-design-based FA practices, PSTs’ alternative conceptions were identified through pre- and post-laboratory concept maps. The results obtained from both qualitative and quantitative data analyses showed that implementing the co-designed FA practices had a significant impact on overcoming most of the alternative conceptions held by the PSTs in all topics of laboratory investigations. This study strongly implies the inclusion of undergraduate students as active co-participants of the iterative reasoning process of the FA design to promote their understanding of chemical concepts in laboratory courses.

“Design a Sensor”: Implementation of Entrepreneurial-Minded Learning in Undergraduate General Chemistry

This article describes the design and implementation of a sensors-based entrepreneurial-minded learning (EML) module in a large (>150 students) first-year General Chemistry II course. Students worked in groups create a novel sensor that solves an existing scientific problem or improves upon an existing sensor. Students proposed and explained the chemical background of their sensors as well as presented their final products to the class in the style of a brief elevator pitch. This module necessitates that students think innovatively, integrate knowledge from varied sources, and collaborate with their peers. The aim of implementing this EML module is to spur creative thinking, innovation, and entrepreneurial learning among first-year undergraduate chemistry students. We conducted course surveys to gauge students’ reception of this module and found that the majority of students enjoyed this activity and learned valuable skills from their experience. Moving forward, we advocate that these and similar learning modules are implemented in large, introductory course settings due to the many benefits that they offer to students.

Use of Interrupted Case Studies to Teach Scientific Communication: Examples from the Effects of Mining on Water Resources in Brazil

The mining industry in Brazil, despite contributing to economic growth, is one of the human activities that negatively impacts the environment. This situation can be contextualized in discussions of several curricular chemistry topics. One way in which science, technology, society, and environmental issues can be discussed in classes is through case studies. This article reports on three interrupted case studies, based on research articles, which were developed and implemented in a Scientific Communication Course offered to first-year undergraduate Chemistry students at the University of São Paulo, Brazil. During two sessions of this course, students, divided in groups, developed hypotheses, chose sampling points and equipment for instrumental analyses, and evaluated data provided in the case studies. Results from a Descending Hierarchical Classification Analysis of oral presentations, performed on IRAMUTEQ software, and from a quiz containing 11 true or false statements (response rate of 79%) provide evidence for the effectiveness of the case studies for conceptual understanding of different topics in chemistry, such as heavy metals, sediments, and principles of instrumental chemical analysis, and for the development of communication and oral presentation skills.

Enhancing academic performance and student success through learning analytics-based personalised feedback emails in first-year chemistry

Recent developments in digital technologies, including learning analytics are changing educational practices due to the wealth of information available and its utility to inform academic interventions for students. This study investigates the impact of personalised feedback emails on students’ academic performance and student success in large first-year undergraduate chemistry courses. Learning analytics was used to inform and generate feedback emails to students at various timepoints during the semester. The feedback emails to students included an evaluation of their current performance, and advice of support systems and resources to support their learning. We analysed the marks of 6334 students at three timepoints during the semester in addition to their final course grade, and compared academic performance across three years of course offerings (2019–2021). We compared students that did not receive feedback (2019 control groups, n = 2391) with students that did receive feedback (2020–2021 experimental groups, n = 3943). Our findings suggest that students receiving personalised emails during the semester were more likely to pass their first-year chemistry course. Furthermore, our data showed that sending personalised feedback emails fostered higher student success among a greater number of students within the cohort, as well as students' appraisal of the personalised feedback.

Implementing the Elements of Course-Based Undergraduate Research Experiences (CUREs) in a First-Year Undergraduate Chemistry Laboratory with Bioremediation Relevance

Implementing the Elements of Course-Based Undergraduate Research Experiences (CUREs) in a First-Year Undergraduate Chemistry Laboratory with Bioremediation Relevance

A construct modelling approach to characterize chemistry students’ understanding of the nature of light

ABSTRACT Across science disciplines, light is a common tool for measuring, characterizing, and catalysing molecules and molecular processes. Despite the ubiquity of light-based tools, little research has been done to investigate how students understand light and light–matter interactions (LMI). This topic is typically first introduced in first-year undergraduate chemistry courses where students initially encounter the quantum nature of light and matter. How students make sense of this content and transition from classical concepts to quantum concepts is relatively unknown. To gain further insight on how students develop quantum-level conceptions about light, we use a construct modelling approach. This approach is best suited to capture progressions in student understanding. In this study, we begin to model students’ understanding of LMI by first developing a model for the nature of light. Two sets of qualitative interviews were conducted about the particulate nature of light and the wave nature of light. Analysis of interviews resulted in four construct maps, which can provide information to instructors and researchers about the variation in student understanding of the nature of light. Findings from this study have implications for how quantum chemistry is introduced at the postsecondary level.

Introducing Atomic Structure to First-Year Undergraduate Chemistry Students with an Immersive Virtual Reality Experience

The present technology report is aimed at demonstrating how the implementation of VR chemistry simulations of atomic structure enhances learning among students. MEL Chemistry VR lessons were incorporated into the classroom for 43 first-year undergraduate ITMO University students. The visualization techniques provided the learners with two important opportunities: (1) connecting the macroscopic and tangible component of chemistry with the submicroscopic component (the real world and the world of molecules) and (2) connecting the submicroscopic component of chemistry with the representational one (atomic structure and orbital diagrams). The results show that implementation of the VR experience into the atomic structure laboratory enhances the learning experience of the students.

Seizing the opportunity: Collaborative creation of academic integrity and information literacy LMS modules for undergraduate Chemistry

With the recent mass shift to an online environment in the university context and increases in course sizes, the need for online learning management system (LMS) content from departments, libraries, and writing services is at an all-time high. In particular, integrated course content is needed that addresses academic integrity and information literacy skills holistically.To ensure that a large number of first-year students would become aware of the resources and services available to them for research, writing, and academic integrity, a partnership between librarians, faculty, and writing support services has produced a series of scaffolded online learning opportunities for first-year undergraduate Chemistry students in their course LMS. The topics collaboratively identified to support students include: academic honesty and integrity, scientific writing, peer review, finding sources, reading academic chemistry articles, and citing using the American Chemical Society citation style.This column will describe and analyze the program development and implementation, make connections to resource development and promotion, and conclude with the limitations and next steps for growth. The developed materials have evolved over the years, and it is hoped that by sharing our experiences, others can see opportunities for online course content development through academic library partnerships.

Investigating first-year undergraduate chemistry students’ reasoning with reaction coordinate diagrams when choosing among particulate-level reaction mechanisms

Reaction coordinate diagrams (RCDs) are an important tool used to visualize the energetics of a chemical reaction. RCDs provide information about the kinetics of the reaction, the mechanism by which the reaction occurs, and the relative thermodynamic stability of the molecules in a reaction. Previous research studies have characterized student thinking about chemical kinetics, including their confusion in distinguishing between kinetics and thermodynamics. Semi-structured interviews were conducted with 44 students enrolled in a second-semester, first-year undergraduate chemistry course to elicit students’ ideas about surface features of RCDs and to examine how students connect those surface features to features of particulate-level reaction mechanisms. Students were provided both a gas-phase reaction and its accompanying RCD, and then they were asked to choose the particulate-level reaction mechanism that best corresponded to both the reaction and the RCD from among several possible particulate-level reaction mechanisms. Students were asked to explain their reasoning throughout the interview. Findings include students who chose the correct mechanism with appropriate reasoning, as well as students who chose the correct mechanism yet still expressed inaccurate ideas related to the surface features of RCDs and the concepts encoded within them. Students struggled to explain and reason with surface features such as peaks, valleys, and peak height. Moreover, students frequently found it difficult to identify meaningful connections between these surface features, the stoichiometry of the reaction, and the steps in a reaction mechanism. In addition, many students failed to mention important features of RCDs when describing their reasoning about the connections between particulate-level reaction mechanisms and RCDs. The implications for incorporating these research findings into teaching practices in first-year undergraduate chemistry contexts are discussed.

A chemistry laboratory platform enhanced with virtual reality for students’ adaptive learning

In recent years, virtual reality system (VRS) has become more prominent among many researchers due to its capacity of providing as close as possible to real-life experience for users from diverse fields of life, such as tourism, academics, manufacturing and medicine. In this study, we present an VRS for the titration experiment in a chemistry laboratory to enable students to learn the titration experiment in a virtual laboratory environment before proceeding to the chemistry wet lab. The virtual chemistry laboratory environment was developed using the Unity Real-Time Development Platform, and the Microsoft SQL Server was used for the database to enable easy assessment of the student performance after the experiment. To evaluate our VRS, we tested it among 50 students (25 high school and 25 first-year undergraduate chemistry students). We collate their user’s experience through a structured questionnaire, and the responses from the students show that 60% agreed that it was helpful, 66% easy to interact with and 54% strongly agreed that it improved learning. Therefore, it is evidence that the proposed VR-enabled chemistry laboratory platform could be used to improve the understanding of chemistry titration practical process among students.

Conceptual Difficulties Experienced by First-Year Undergraduate Chemistry Students in Assigning Oxidation Number: A Case Study of High School Chemistry Textbooks

The purpose of this research was to investigate first-year undergraduate chemistry students’ understanding in assigning oxidation number following a case-study course instruction. A list of multiple choice question and interview section was formulated to identify the initial knowledge as representative of their conceptual understanding in assigning oxidation number obtained from their chemistry textbooks. This study revealed that most of 34 students who participated were confused about the nature of oxidation number. In the section of the interview which focused on applying “The Rules”, many students experienced more problems in assigning oxidation number of sulfur in S2O32– ion. Several misconceptions relating to the inappropriate assumption in assigning oxidation number were identified. The data illustrated how students attempt to make sense of the concept obtained from High School with the knowledge they had already constructed in solve of a given question. The research implied that the teachers, lecturers, curriculum developers, and High School Chemistry textbooks authors need to be cognizant of the importance of related concept (electronegativity and dot-Lewis structure) with oxidation number. The high school and chemistry textbook authors were recommended to introduce this interconnection (including formal charge) to minimize the misconception and conceptual difficulties experienced by first-year undergraduate chemistry students in assigning oxidation number.

Online pre-laboratory tools for first-year undergraduate chemistry course in Uruguay: student preferences and implications on student performance

As a fundamental part of their chemical education, first-year undergraduate students are substantially involved in laboratory activities. Despite the specific teaching staff choices on the main laboratory aims, students normally receive a vast amount of information during these activities. Apart from understanding theoretical content, fundamental skills such as manipulation, data collection and interpretation should be developed. In this context, learners could feel overwhelmed since they can only process a few pieces of information at a time. Indeed, our experience at theUniversidad de la República(Uruguayan public university) shows that many first-year students are in fact not able to cope with all the information they receive during laboratory activities. As a result, many of them only follow the experimental protocol automatically, without gaining significant knowledge or developing the necessary skills. In this work, we assessed the use of new online interactive pre-laboratory activities implemented for 252 first-year university students enrolled in a 12-module General Chemistry laboratory course. The student choice of interactiveversusmore traditional material was evaluated together with observed preferences regarding the different interactive tools offered. Besides, an online pre-laboratory discussion forum was also implemented and assessed. Both the interactive material and the discussion forum were chosen freely by the majority of students (61% and 79%, respectively). Interestingly, the choice was to some extent modulated by student previous performance. Interactive pre-laboratory material was more frequently chosen by low previous performance students, whereas pre-laboratory forum was preferentially used by high previous performance students. Finally, the influence of these new materials on student laboratory performance was statistically analyzed. Other personal and academic variables were also taken into account. Interactive material access was positively correlated with the final laboratory marks for medium previous performance learners. On the other hand, for lower previous performance students, the academic discussion between teachers and partners promoted by the online forum was positively correlated with their academic performance.

Investigating the viability of a competency-based, qualitative laboratory assessment model in first-year undergraduate chemistry

In chemistry curricula, both the role of the laboratory program and the method of assessment used are subject to scrutiny and debate. The ability to identify clearly defined competencies for the chemistry laboratory program is crucial, given the numerous other disciplines that rely on foundation-level chemistry knowledge and practical skills. In this report, we describe the design, implementation, results, and feedback obtained on a competency-based assessment model recently introduced into the first-year laboratory program at an Australian university. Previously, this laboratory program was assessed via a quantitative, criterion-referenced assessment model. At the core of this new model was a set of competency criteria relating to skills-acquisition, chemical knowledge and application of principles, safety in the laboratory, as well as professionalism and teamwork. By design, these criteria were aligned with the learning outcomes of the course and the degree itself, as well as local accrediting bodies. Qualitative and quantitative feedback from students (and staff) obtained before and after the implementation of this new model suggested this approach provided an enhanced learning experience enabling a greater focus on the acquisition of fundamental laboratory skills and techniques.

Contextualizing Learning Chemistry in First-Year Undergraduate Programs: Engaging Industry-Based Videos with Real-Time Quizzing

First-year undergraduate classes present challenges in teaching as they usually have high student enrolment numbers and students studying across a range of higher education programs that require a fundamental understanding of knowledge that is not perceived in their area of study. This provides a challenge in terms of engaging and maintaining student interest, primarily because students do not recognize the application of knowledge to their field of study. The challenge is to contextualize the content for the range of student cohorts within the one course. This is a common issue within many of the programs offered at RMIT University, Melbourne, Australia. The teaching pedagogy and learning design pattern developed address the implementation of activities that incorporate the flexible delivery of content, including online media-rich interactive learning via the creation of short videos, to illustrate the direct application and relevance of the content and thereby capture student interest and increase their motivation to learn. It also includes formative feedback to students via real-time student quizzing. In this case study, seven YouTube chemistry videos were created for a first-year undergraduate chemistry course. The videos created needed to be short, sharp, and engaging and were based on relevant chemistry topics taught. Each video created also included at least one Australian-based industry to give real-life relevance and focus as well as tailor them to the local student cohort.

A First-Year Chemistry Undergraduate “Course Community” at a Large, Research-Intensive University

This article describes the integration of a cocurricular “Community” into a first-year undergraduate chemistry course at the University of Toronto. The Community has been in existence since 2006, with over 700 students being involved. Its broad objectives have been three-fold: to inform course members about departmental resources and their significance, to teach skills and provide tips away from formal class content, and to promote the importance of undergraduate research/highlight available opportunities. The Community has received very positive feedback over a number of years and has resulted in a large increase in the number of students enrolling in second- and fourth-year undergraduate science research courses.

‘Named Small but Doing Great’: An Investigation of Small-Scale Chemistry Experimentation for Effective Undergraduate Practical Work

In theory, practical work is an established part of university-level chemistry courses. However, mainly due to budget constraints, large class size, time constraints and inadequate teacher preparations, practical activities are frequently left out from chemistry classroom instruction in most developing countries. Small-scale chemistry (SSC) experimentation in which one uses miniature chemical equipment can drastically reduce quantities of chemicals used during experimentation, which can help overcome some of the barriers preventing practical work in the chemistry classroom. This study evaluated the effectiveness of using miniature chemical equipment at the undergraduate level in increasing students’ understanding of chemistry concepts as well as in improving their attitude towards chemistry practical work. Two comparable groups of first-year students who enrolled for a Practical General Chemistry course participated. A quasi-experimental design was employed in which the experimental group (N = 49) used the SSC approach while the control group (N = 52) followed the traditional approach for over 8 weeks. Data were gathered using chemistry tests, attitude and perception questionnaires and interviews. Findings showed that the SSC approach was as effective as the traditional laboratory approach in improving students’ attitude towards practical work, but more effective in enhancing students’ understanding of chemistry concepts. More interestingly, SSC was positively accepted by both students and instructors as an effective strategy for teaching first-year undergraduate chemistry practicals. Some shortcomings of the approach were also identified.

Ion Exchange and Thin Layer Chromatographic Separation and Identification of Amino Acids in a Mixture: An Experiment for General Chemistry and Biotechnology Laboratories

A multiday laboratory exercise is described that is suitable for first-year undergraduate chemistry, biochemistry, or biotechnology students. Students gain experience in performing chromatographic separations of biomolecules, in both a column and thin layer chromatography (TLC) format. Students chromatographically separate amino acids (AA) in an unknown mixture using a small column of Dowex-50 resin. The AA elution profile is determined by graphical analysis of a rapid ninhydrin microplate spectrophotometric assay that converts the colorless AA into colored ninhydrin derivatives. Column fractions corresponding to elution “peaks” are further analyzed by TLC on silica gel plates alongside AA standards. Visualization of AA migration on TLC is accomplished with a ninhydrin dipping protocol. Students use their chromatography data, structural information about the resin and the various AA, and their knowledge of intermolecular attractions and acid–base chemistry to determine the identity of the AA in their unknown mixture.

Thinking Outside the Classroom: Integrating Field Trips into a First-Year Undergraduate Chemistry Curriculum

Studies on student learning during primary- and secondary-school course-related field trip activities have shown lasting cognitive and socio-cultural effects. However, fewer studies have investigated the potential benefits of incorporating field trip activities into post-secondary education. The curriculum in a first-year university chemistry course provides the foundations for understanding processes we encounter every day. Thus, field trips can provide an opportunity to help students see beyond their everyday experiences into the world around us through a chemist's eyes. As a way of seeing their lecture material in action, taking students on field trips to water treatment plants helps describe a real-world application of solution stoichiometry and polymer chemistry. Similarly, a trip to a winery assists understanding of chemical transformations that occur in organic molecules, and a trip to wastewater treatment plants enables students to see applications of acid–base and redox chemistry. These experienc...

A Web-Based Interactive Homework Quiz and Tutorial Package To Motivate Undergraduate Chemistry Students and Improve Learning

This study presents a Web-based interactive homework quiz and tutorial package that we have devised to improve the learning of first-year undergraduate chemistry students. We developed this automated scheme, based on WWWAssign, to produce randomly generated quizzes from a large database of questions, instantaneously grade that homework, give a fully-worked solution, and provide individually targeted tutorial assistance. Success in these quizzes was a necessary requirement before taking supervised tests. We found a positive correlation at the p= 0.1 level (90%) between voluntary extra use of the quizzes in the interactive package and the final course grade. All students undertook more quizzes than the base course requirement even though the quiz grades did not contribute to the total course grades. We suggest that students were motivated to pursue additional practice with the quizzes and associated tutorial information, as they perceived some benefit in this student-centered study tool and could access it at any time.

Kinetics in Thermodynamic Clothing: Fun with Cooling Curves: A First-Year Undergraduate Chemistry Experiment

A series of experiments examining the phenomenon of cooling by producing part of the cooling curve for water at different initial temperatures, focussing on the fact that the curve is nonlinear (unlike the information presented in many texts).