Scientific inquiry is both theoretical and empirical. It succeeds by bringing thought into productive harmony with the observable universe, and thus, students can attain a robust understanding of the nature of science (NOS) only by developing a balanced appreciation of both these dimensions. In this article, I examine naïve empiricism, a teaching…

Bridging organic and inorganic chemistry as well as molecular biology, this undergraduate experiment deals with the synthesis of ligands for metal complexes that can cleave DNA. Students gain theoretical and experimental expertise about metal--DNA interactions and the mechanisms behind DNA cleavage. This experiment lays a basis for the…

A teaching laboratory experiment is described where students prepare in vitro transcription reactions of a fluorescent RNA aptamer, named Broccoli, and observe the production of the aptamer in real-time on a fluorescence plate reader. Alternate visualization methods with minimal costs are also described for laboratories lacking this…

Organic semiconductors (OSCs) are making great progress as active components in alternative energy and flexible electronics technologies that are of interest to many undergraduates. However, in materials governed by the confluence of multiple length scales (molecular (Angstrom), intermolecular (nm), domain (100s nm)), providing a pedagogically…

Addressing student conceptions with instruction has been a major issue in physics education for decades. However, too often the focus is on treating student ideas as "misconceptions" rather than as potentially productive ideas with varying degrees of sophistication. This paper introduces "learning progressions" as models that…

The research practices of academics of science teaching and learning (academics-"of-st&l") may be considered a connected, constructed landscape, the peaks of which are shaped by accumulation of like practices. Entangling interviews with twenty-seven academics-"of-st&l" and document analyses, in this paper I map the…

New forms of classroom participation, envisioned as contributing to democracy, are advocated by the South African national curriculum. This paper investigates what form participatory science teaching can and should take in South Africa where the legacy of colonialism and apartheid remains and considers this question through the efforts of two…

This study evaluates the use of an open-ended question to determine students' knowledge structure on the topic of galvanic cells. The open-ended question was developed and administered to 163 Grade 10 students who had earlier completed a course on electrochemistry. Students' responses were marked as well as coded on the basis of the fields…

Teaching ethics in elementary science may seem abstract or simply another topic to add to an already rigorous curriculum. However, it is an integral part of science and engineering instruction and a natural extension of what elementary educators do every day. Teachers help students develop ethical practices or "habits of mind" when they:…

This multiple case study examines how teachers request students' use of their content knowledge and conceptual understandings from out-of-school experiences while reasoning about science concepts and the ways in which students perceive and respond to these requests. Three middle school teachers and a total of 57 middle school students participated…

An important but challenging problem-solving technique in introductory mechanics is that of using "tilted axes." For inclined plane and centripetal motion problems, using axes that are aligned relative to the ramp direction or the radial direction (rather than the horizontal and vertical) yields equations that are conceptually more…

When students first encounter energy bands in semiconductors, and how the properties of simple semiconductor devices such as the "p-n" junction diode depend on them, the concept can be a bit difficult to grasp. As part of an undergraduate physics course for non-STEM majors that includes semiconductors and simple devices based on the…

The author created a project aimed to develop and implement the assessment of working scientifically (WS) skills at Victoria Park Primary School. The author had previously identified a gap in the curriculum coverage and assessment of WS skills and his goal was to address the lack of provision for assessing children's WS skills and raise the…

In astronomy, methods such as direct imaging or interferometry-based techniques (Michelson stellar interferometry for example) are used for observations. A particular advantage of interferometry is that it permits greater spatial resolution compared to direct imaging with a single telescope, which is limited by diffraction owing to the aperture of…

A little-known type of nuclear reactor called the "molten salt reactor" (MSR), in which nuclear fuel is dissolved in a liquid carrier salt, was proposed in the 1940s and developed at the Oak Ridge National Laboratory in the 1960s. Recently, the MSR has generated renewed interest as a remedy for the drawbacks associated with conventional…