In the Spring 2021 Organic Chemistry Lab class at Penn State Schuylkill, COVID-19 restrictions and uncertainty required a flexible plan. The first 4 weeks of 15 were fully remote, and videos of standard organic techniques were used, followed by an exam. In the next 5 weeks, some students were in the lab and some were remote. A document camera was…

Engaging students in scientific practices has become an important pedagogical component in STEM education, although its implementation in laboratories is still emerging. This paper uses three types of guiding questions to facilitate scientific practices in introductory and analytical chemistry laboratories. What makes our instructional model…

Research has shown the highest level of understanding in the geosciences to be the ability to think about the Earth as a dynamic system. The Earth system contains four spheres: the geosphere, the hydrosphere, the biosphere, and the atmosphere. These spheres are linked through the biogeochemical cycles that move matter and energy through the…

As the conversation in higher education shifts from diversity to inclusion, the attrition rates of students in the STEM fields continue to be a point of discussion. Combined with the demand for expansion in the STEM workforce, various retention reforms have been proposed, implemented, and in some cases integrated into policy following evidence of…

This experiment combines analytical techniques of solid-phase extraction (SPE) and gas chromatography quadrupole time-of-flight mass spectrometry (GC-QTOF-MS) to determine organochlorine pesticides (OCPs) in river water as a means to develop and improve student understanding of the use of GC-QTOF-MS for qualitative and quantitative analysis. In…

Due to the SARS-CoV-2 pandemic (spring 2020), universities quickly moved to remote instruction. Our research during this time frame included investigating course-based undergraduate research experiences (CUREs) in General Chemistry, and we found ourselves in the middle of a CURE study without any laboratory component (aka…

This work aims to evaluate the evolution of chemical bonding concepts of high school students at public schools in southern Brazil. For this, we built the epistemological profile of each student who took part in a teaching-learning sequence (TLS) about this topic, based on the foundations of Bachelard's theory. Following the principles of the…

Organic electrosynthesis is an increasingly popular tool for driving and probing redox reactions. Recent advances in this field often employ an electrocatalyst to enhance the selectivity and efficiency of electrochemical reactions. A laboratory experiment was developed to introduce students to relevant mechanistic techniques in electrochemistry…

In an idealized General Chemistry Laboratory curriculum, students would hone their experimental design ability with practice encouraged by laboratory exercises designed to be open-ended. However, traditional General Chemistry Laboratory courses often lack opportunities for students to design their own experiments, instead opting to provide…

Powder diffraction is one of the most widely used analytical techniques for characterizing solid state materials. It can be used for phase or polymorph identification, quantitative analysis, cell parameter determination, or even full crystal structure analysis using the powerful Rietveld refinement method. As with much of modern crystallography,…

Highly efficient microwave-assisted organic synthesis is now commonplace in both industry and academia. Recently, a conductively heated sealed-vessel reactor was introduced that acts very similarly to a microwave reactor and is more affordable. Application of such reactors in teaching laboratories is advantageous because of the restricted window…

Girls are underrepresented in mathematical and science Olympiads, global informal learning activities which often serve as stepping stones for admission to top universities and future STEM careers. The present article aims to investigate the role of implicit gender-science stereotypes on representation and achievement among participants of the…

Research on the Advanced Placement (AP) program generally shows that students scoring 4s and 5s on AP exams outperform their non-AP peers in subsequent college courses. However, faculty often advise students with AP credit to repeat prerequisite courses in college before attempting advanced coursework, and there are few studies that provide…

In this article we describe the construction of a low-cost electronic device to adapt the widespread traditional approach of Analytical Chemistry teaching into laboratory experimentation based on the guided research model. To this aim we construct a portable electronic instrument based on the Arduino microcontroller and use it to develop various…

The instruction of high enrollment general and organic chemistry laboratories at a large public university always has curricular, administrative, and logistical challenges. Herein, we describe how we met these challenges in the transition to remote teaching during the COVID-19 pandemic. We discuss the reasoning behind our approach, the utilization…