Observation is widely regarded as a fundamental way of studying nature. However, due to its complexity, proposing a comprehensive characterization is challenging. Observation is a method of studying nature that can be divided into several dimensions. Each of these dimensions can be presented as a pair of terms, which are elaborated in this paper…

The emerging field of genomic medicine offers an opportunity for biology and anatomy teachers to bring the topics of DNA, genetics, molecular processes, and evolution together into one experience. Through the genomic medicine paradigm, students see the unbroken connection between small biological topics such as mutations and their potential…

The Next Generation Science Standards (NGSS) engage students in the epistemic, or knowledge building, components of science through three-dimensional learning. Each scientific domain has its own epistemic aspects that result from different social groups going about science in different ways to conceptualize different bodies of knowledge; education…

A simple, safe, and easy demonstration of the reaction of sodium peroxide with water is presented. The reaction is performed in a plastic bottle by adding water to sodium peroxide supported in a rubber "thimble"; oxygen is detected by the reignition of a glowing splint, while the generation of sodium hydroxide is indicated by…

This work discusses a didactic path aimed at revisiting the first experiments on the transmission and detection of electromagnetic waves, performed by Guglielmo Marconi at the end of the 19th century. With very simple materials it is possible to set-up apparatus that allow to illustrate practically the simple physical picture of wireless…

Science teachers face an incredible challenging task of combining research on how students learn best, the three-dimensions of the Science Education Frameworks that in themselves are complicated to understand, and instructional sequences that lead to deeper learning. "Activating Students' Ideas: Linking Formative Assessment Probes to…

Heart muscle cells, or cardiomyocytes, exhibit intrinsic contractility in vitro. We found that commercially-available mammalian cardiomyocytes serve as an excellent model system for studying the cytoskeleton and cellular contractility, fundamental topics in undergraduate cell and molecular biology courses. Embryonic rat cardiomyocytes were plated…

Here, we present a laboratory activity in which the students work on an analysis of a questioned document that was written with one out of five possible pens. As a forensics study, the activity applied chemistry and analytical chemistry tools to solve the case. The students were able to apply polarity and solubility concepts to select and discard…

Laboratory experiments provide training to students in experimental techniques and strengthen the understanding of the theory. Herein, a new introductory experiment for organic chemistry laboratory courses is described where students are trained in washing an unknown neutral organic compound using liquid/liquid extraction, isolating it via…

This integrated STEM activity on the design of a vertical farming system has biology as the lead discipline and relates to the concept of photosynthesis. Students investigated the optimal design of vertical farms that will deliver appropriate amounts of water, sunlight and carbon dioxide to plants such that there will be optimal yield. Through…

A straightforward experimental set-up, requiring a two-liter bottle, a ruler and a stopwatch, is used to provide data appropriate for modelling with Torricelli's Law in the simplest case, and a more sophisticated differential equation when losses are taken into account and a pipe extension is considered. With only an exit hole included in the…

This article addressed the significant issue of identity crisis experienced by students in their choice of profession, as highlighted in various research studies. The importance of examining professional was emphasized to identity development from a disciplinary perspective, particularly in the biosciences and allied fields. To achieve this, we…

Junior high school is pivotal for developing skills and fostering a lasting interest in science subjects. Understanding the components that either lead to or hinder academic engagement is essential. This research investigates an indicator of the learning environment that significantly influences academic engagement in science of junior high school…

The intervention programmes have a direct influence on teachers' knowledge of teaching different topics. This paper focuses on how Grade 8 natural science teachers' knowledge developed during an intervention programme. Eight schools were selected to participate, and 25 Grade 8 Natural Sciences teachers from Gauteng province participated. Data were…

It is a controversial issue in education that students perform dissection experiments. Different opinions have been noted in studies on this subject, and various applications are recommended according to education levels. This case study aimed to determine pre-service science teachers' views of hands-on dissection and virtual dissection. The study…