Instructional labs are being transformed to better reflect authentic scientific practice, often by removing aspects of pedagogical structure to support student agency and decision making. We explored how these changes impact men's and women's participation in group work associated with labs through clustering methods on the quantified behavior of…

Inductively coupled plasma optical emission spectroscopy (ICP-OES) is one of the most commonly used analytical techniques for the measurement of metals in environmental matrices. However, one of the drawbacks of ICP-OES is interference, viz., spectral and nonspectral (due to transport effects) interference. In this simple laboratory experiment,…

Keto-enol tautomerism is a special example of structural isomerism. In this experiment, 6-chlorofulvene is predominantly yielded during the chlorination reaction of 6'-hydroxyfulvene with POCl[subscript 3] in the presence of DMF. The high regioselectivity of this reaction is dominated by intramolecular hydrogen-bonding and steric hindrance,…

To reduce the spread of COVID-19, most universities and colleges have moved all instruction temporarily online, including the instruction of chemistry laboratory courses. Teaching laboratory courses online while keeping students engaged is challenging and often leads to presenting prerecorded lab demonstrations, lab animations, or virtual…

This paper reports on a study aiming at examining the development of science process skills through the implementation of experiments in a science course which was performed in flipped classroom design. Flipped classroom model was implemented for a series of experimentation activities in a science classroom in which 38 science teacher candidates…

An augmented reality (AR) application that complements a DNA precipitation experiment has been developed for use on mobile devices. The AR experience provides atomistic detail on the reasoning behind the experimental observations. The development of the application is described, as are the download data. In a pilot survey, the students were asked…

This paper demonstrated a simple experiment for determining the coefficient of rolling friction of a hollow cylinder rolling on a curved track using a smartphone's sensors. We studied theoretically and experimentally the rolling motion of a hollow cylinder uncovered and covered with various materials (synthetic leather and sponge sheets). The…

In this brief experiment, students create a superhydrophobic surface as an application of polar--nonpolar interactions and redox chemistry. Half of a zincgalvanized steel strip is coated in copper nanoparticles through electroless deposition. A layer of nonpolar octadecanethiol is added to half of that copper surface. Students classify the three…

Experimental electrochemistry offers unique opportunities for interactive instruction at all levels of education; however, widespread adoption in curricula is hindered by high costs associated with electrochemical instrumentation. Thus, the development of affordable instruments represents an essential step toward making electrochemistry accessible…

A chemistry course designed as an elective for chemistry, biochemistry, biology, and pharmaceutical science majors is described. The course is designed for second- through fourth-year undergraduate students. The prerequisite is first-semester, second-year undergraduate organic chemistry with the second semester of the organic sequence as a…

A laboratory activity is described for senior high school or first year undergraduate level students that illustrates key concepts linked to extractive metallurgy. This experiment demonstrates preferential binding of a methoxyphenolic oxime ligand to Cu[superscript 2+] in the presence of other transition metal ions in aqueous solution. The…

A study was conducted on how scientific laboratory lessons contribute to building arguments, both cognitively and socially. The population consisted of 12 second-year pre-service teachers at a college of education specializing in the teaching of biology and chemistry in middle school. The study examines the nature of the arguments students raise…

Medical physics uses physics knowledge in medicine or healthcare. The question surrounding the methods of measuring temperature is important in medicine. The aim of this article is to explore the possibilities of using Microsoft Excel to study thermometers. The physical concepts and laws related to temperature measurement have been considered. The…

In this paper we present activities that can help students deepen their understanding of DC circuits and develop practical competences. The students investigate electric properties of commercially available conductive thread and solve a practical design task using the thread. The activities follow the framework of investigative science learning…

In the activity described in this communication, the authors present a simple experiment that can be implemented with moderate operational costs and that allows students to acquire the manipulative skills necessary for chromatographic analysis of a familiar fuel that still plays a fundamental role in providing energy for transport of passengers…