Perhaps the most commonly cited student idea about forces in the literature is the notion of an impetus force, defined as the "belief that there is a force inside a moving object that keeps it going and causes it to have some speed," that can then "fade away as the object moves along." According to the literature, even after…

The COVID-19 pandemic forced the adoption of online laboratories. The present article discusses the virtual laboratories used by students. The questions posed by students provided targeted teaching opportunities.

High-fidelity anatomical models can be produced with three-dimensional (3D) scanning techniques and as such be digitally preserved, archived, and subsequently rendered through various media. Here, a novel methodology--digital body preservation--is presented for combining and matching scan geometry with radiographic imaging. The technique…

The Widlar current source is one of the basic current sources that undergraduate students encounter throughout their learning process on electronics courses. The Widlar current is actually given in terms of a transcendental equation. Although an analytical solution exists in terms of the Lambert W function it might not be that useful for students…

When thinking about Olympic winter sports and watching events on television, people mostly focus on events where the chances of success are high for fellow-countrymen. For example, in the Netherlands speed skating is considered the main winter sports event. But with Kimberley Bos there is now also a Dutch medal candidate for the Winter Olympics…

Attending to distracting or competing information is typically considered detrimental to learning, but the presence of competing information can also facilitate learning when it is relevant to ongoing task goals. Educational settings often contain contextual elements such as classroom decorations or visual aids to enhance student learning. Despite…

As a result of the COVID-19 pandemic, it is crucial for an introductory course in biochemistry to move from in-person instruction to total remote learning. There are four transferable skills in the course: problem-solving, laboratory psychomotor skills, data analysis and interpretation skills, and presentation skills. Since all lab buildings were…

In order to fix some important concepts of Fundamental Physics, either because they are not usually discussed in depth in theoretical classes and much less at laboratories, or because they are not sufficiently developed in textbooks, it is more effective not to tackle them directly, but to propose a mental or practical experiment to attract the…

Electrification by rubbing different materials is a well-known phenomenon with a history that began more than five centuries B.C. ago. However, simple experiments can lead to contradictory or inconsistent results, and the history of this phenomena is plagued with non-intuitive results. For example, triboelectric charging by rubbing identical…

Multistep synthesis is a key capstone experience in organic laboratory instruction. Here, a four-step synthesis of avobenzone, an active component in sunscreens, has been developed that can be completed in two 4 h laboratory periods. This synthesis incorporates green principles and includes an aldol condensation, electrophilic addition of bromine…

While the importance of explicit and reflective NOS instruction is clear in the literature, questions remain about how to enact such instruction. That is, literature is sometimes unclear in defining how to enact explicit and reflective NOS instruction. While some authors recommend using questions (e.g., Clough 2007) to enact effective NOS…

Infrared spectroscopy (IR) is a staple structural elucidation and characterization technique because of its ability to identify functional groups and its ease of use. Interestingly, it allows the capture of electronic effects via their influence on the bond strength of "probes", such as the carbonyl group and also offers a wealth of…

Understanding the physicochemical properties of organic compounds with potential biological uses is central in current research topics. Thus, students must pursue the integration of different fields of chemistry to obtain and understand the physicochemical parameters that characterize the mechanism of action of key organics compounds. This…

We present two simple classroom exercises designed to explain challenging concepts in conformation for students beginning organic chemistry. These macroscopic demonstrations serve as analogies to bridge students' understanding of flat two-dimensional drawings to real three-dimensional molecules. In the first demonstration, an apple is drawn from…

Engaging students in the essential practices of science has been forwarded as an effective means to achieve scientific literacy for all students by promoting the learning of content, procedures, and the epistemology of science concurrently. However, the emphasis on science practices requires teachers not only to develop skills and knowledge…