COVID-19 has thrust educators into a period of uncertainty, complicating conventional ways of teaching and learning. We suspect that the pandemic has magnified the challenges that some high school teachers already experience, particularly when they are the sole chemistry teacher at their school. The pandemic has likely inhibited collegial…

Teaching chemistry as a practice rather than as a mere collection of facts demands that teachers modify their practices, particularly their approach to formative assessment (FA). In this study, we investigated how teachers' FA practices changed as a result of their participation in a professional development program designed with a Chemical…

In this laboratory experiment, students evaluated three silver(I) complexes as potential additives for dental adhesives based on bacterial growth inhibition, heat stability, water insolubility, and cost-effectiveness. Each student prepared and analyzed a cyanoxime ligand and its corresponding silver(I) complex. Students characterized the…

A comprehensive undergraduate experiment about extraction, separation, and identification of essential oils (EOs) from a natural plant is described. "Acori tatarinowii" Rhizoma (ATR) was used as the raw plant material. Two devices (Soxhlet and Clevenger) with different extraction principles were employed for EO extraction from ATR,…

This paper reports a demonstration of a 90 min on-demand class where a chemical experiment is performed to educate nonscience majors on surfactants. First-year undergraduate students perform the water ball in a water bottle experiment at home and learn about the structure and properties of organic compounds in the demonstration. The experiment is…

Evidence-based reasoning and critical thinking are two crucial scientific abilities of students, sharing a close relationship with each other critical thinking is not just randomly refuting but a logical-reasoning thinking based on solid evidence. However, in real teaching circumstances of experiment classes, students easily directly accept the…

This research aimed to explore the conceptual structure of chemical equilibrium in upper-secondary school students using factor analysis. Research on chemistry education has shown that chemical equilibrium is an important but difficult-to-understand topic. Exploring the conceptual structure of chemical equilibrium among students will help…

In this laboratory experiment, students explore the aquatic photochemical fate of ranitidine and cimetidine, two common pharmaceutical pollutants found in wastewater. It provides an engaging environmental context for students to develop knowledge of reaction kinetics and photochemistry as well as skill in using analytical instrumentation. This…

Iodonium zwitterions are hypervalent iodine compounds in which the iodine center binds to two substituents and carries a positive formal charge which is compensated by a negative charge within the same molecule. Under thermodynamic conditions, iodonium zwitterion sallow concerted nucleophilic aromatic substitutions to be performed, followed by…

The National Center for Biotechnology Information Entrez Direct (EDirect) software facilitates programmatic access to numerous biomedical, chemical, and literature databases from within a Unix terminal. EDirect has traditionally been used for command line access to NCBI data within the fields of computational biology and bioinformatics. This…

Approaching elective courses and courses on special topics in Chemistry can seem daunting at times, given the varied backgrounds of the students, together with the broad nature of topics. Often, institutions may give incentives for creating sustainability related course offerings, but knowing where to start and how to organize the information…

This is an easy and cheap experiment where chemistry Masters students can evaluate the role of some metal ions (i.e., Cu[superscript II] and Mn[superscript II]) in dopamine oxidation, related to Parkinsonism. The required prior knowledge is being familiar with the basis of UV-vis spectroscopy. Details of the activity, including procedure and…

Recent international documents and educational standards have recommended Science Education be based on three dimensions (Scientific Practices, Crosscutting Concepts, and Disciplinary Core Ideas). This has resulted in an increased interest in research involving Scientific Practices in Science Education. The objectives of this article are to: I)…

With the continuous development of technology and people's dependence on the Internet, more and more teachers' professional development is carried out on the Internet. Since no one has studied the professional development of online middle school teachers, we did this study based on this research gap. This article is a research on the professional…

Due to international calls for the use of the integrated Science, Technology, Engineering, and Mathematics (STEM) approach to train learners pursuing STEM-related careers and citizens who are competitive problem solvers, teachers' training for the integrated STEM approach is imperative. Given the importance of integrated STEM teacher training,…