This paper addresses a popular topic in science teaching and competitions for primary and secondary school students. Experiments with colliding coins are relatively easy to perform and therefore popular in science lessons. We used the idea in the science competition we organized for pupils aged 6 to 13 years.7 The science competition is based on a…

This paper explores the influence of Science Teaching Orientations (STOs) on Teacher Professional Knowledge (TPK) domains of five in-service Malawian secondary school science teachers. The study was grounded within Friedrichsten et al.'s (2011) definition of STOs and Gess-Newsome's (2015) conceptualization of TPK. We gathered data using…

As a result of recent technological developments, many mobile applications used in the educational environments have emerged. One of these applications is the augmented reality technology used in smartphones and tablets. Many augmented reality applications are now prepared with 4Dtechnology and are employed to transform virtual environments into…

This paper shows how two distinct but related models can be used to bring out the essential physics of heat flow in one dimension. The first is a simple step-wise procedure using "SMath Studio," while the second is an electric analogue using a basic RC ladder connected to an Arduino microcontroller. Both models can be demonstrated in…

Due to the COVID-19 pandemic we were confronted with the transition of a large, on-campus introductory soil science course into an online setting. This created several challenges, such as providing meaningful learning experiences to engage first- and second-year students, and restructuring course content for the online environment. The objective…

This research focuses on chemistry teachers' enacted pedagogical content knowledge (ePCK) in equilibrium in chemical reactions. The enactment dimension of this pedagogical content knowledge (PCK) encompasses enacted knowledge and skills as well as those embedded in practice concerning the Refined Consensus Model of PCK, the most recent PCK model…

The aim of the current paper is to investigate the traces of socio-cognitive influences in kindergarten teachers' representations about the practices they tend to follow when they develop Natural Sciences activities in kindergarten. A quantitative approach was used, with the research tool being an electronic questionnaire that was completed online…

To help students acquire mathematics and science knowledge and competencies, educators typically use multiple external representations (MERs). There has been considerable interest in examining ways to present, sequence, and combine MERs. One prominent approach is the concreteness fading sequence, which posits that instruction should start with…

Bacteria, viruses, and other invisible creatures are, in brief, microorganisms. Especially with the onset of the COVID-19 pandemic, the features of microorganisms, their density, and relevant precautions have grown in importance. Knowing the density of microorganisms at school will cause our cleaning habits to change. In this study, efforts were…

DNA structure has been leveraged in a variety of facets that allow scientists to perform a range of assays, including ones for identification of species, establishing evolutionary relationships between taxa, or even identifying individuals. Here, we present a DNA barcoding method as practical, hands-on approach that connects several experimental…

This study took 'context' as a focal point in the context-based approach and its investigation was anchored on an analytical framework, which is composed of three dimensions of context: origins, intentions, and occasions. Content analysis was employed as the research methodology with 878 contexts identified from 96 copies of awarded chemistry…

A belief in teleology is often suggested to be a barrier in children's science education. Many studies have catalogued children's use of teleological explanations, but fewer have developed approaches to tackle children's use in scientific contexts. This paper reports two studies that utilised dialogic interventions alongside Concept Cartoons to do…

A practical experiment is described to estimate the distance to a star using simple equipment, suitable for secondary or undergraduate students. The brightness of the star is visually matched to a miniature filament lamp, and its distance inferred from the inverse square law. Students gain an appreciation of astronomical units and practice in…

Solid lipid nanoparticles (SLNs) are exciting nanoparticles used for transporting therapeutic drugs into an organism. In this laboratory work, a simple experiment is performed to introduce master's students into the field of nanotechnology, here applied to health including the applications in the healthcare/pharmaceutical and cosmetic industry.…

In contrast to a macroscopic solid, the color and spectroscopic properties of gold nanoparticles change with size. Here, we propose a teaching platform for high school students (hereafter defined as students, attending secondary school in Europe, preparatory high schools in the US, or any educational institution of a comparable level) that…