Today, solar cells are very familiar to the broad public, and everyone has noticed their particular geometry resembling a square with rounded-off corners. However, the rationale behind this geometry is little known. This paper presents a precise study of the geometry of silicon solar cells and its evolution since their appearance in the early…

The Cartesian diver is an old and useful demonstration of fluid-related phenomena, including Archimedes' and Pascal's principles. While the diver gets its name from the scientist and philosopher René Descartes, the first written description of the device was given by Raffaello Magiotti. The modified diver presented here is related to Feynman's…

The Roberval balance mentioned by E. Scott Barr presents a phenomenon against intuition that appears to violate the principle of torque equilibrium. Roberval called his balance a "static enigma." This apparent paradox went unexplained for well over a century until L. Poinsot in 1804 explained that the thrusts created in the parallelogram…

Understanding the world around us is a growing necessity for the whole public, as citizens are required to make informed decisions in their everyday lives about complex issues. Systems thinking (ST) is a promising approach for developing solutions to various problems that society faces and has been acknowledged as a crosscutting concept that…

For the past decade, the College of Chemistry at UC Berkeley has iteratively redesigned general chemistry laboratory courses to introduce students to green chemistry concepts, while simultaneously using green chemistry as a relevant context to learn chemistry. To investigate the effectiveness of this curriculum we developed approaches to…

Proteins are essential for cell function, and their biological performance depends on three-dimensional (3D) structures. Insulin is made up of 51 amino acids and is a critical hormone involved in glycaemia regulation. In basic education, concepts involving proteins (synthesis, structure, interactions, and function) are abstract and difficult for…

The literature on scientific modelling practices in science education has provided a fruitful discussion on how learners tend to view models vs. how and what they should think about them. One approach is to teach students that models are abstractions so that they do not view them as a copy of phenomena they represent. Although teaching students…

Students struggle to regulate their learning during independent study sessions. In this study, we ask whether an online behavioral intervention helped introductory students decrease distraction while studying. The intervention consisted of exam 1 reflection, exam 2 planning, and exam 2 reflection exercises. During planning, students formed a goal,…

Swedish preschool science practice is confined to a unique educational setting where upbringing, care, and education are intertwined. This allows teachers to develop innovative cross-curricular and multidimensional science teaching. At the same time, society demands the digitalization of preschool practice, which has caused concern not only about…

More than a decade ago, the K-12 Framework for Education and the Next Generation Science Standards (NGSS) shifted states' notions of what constitutes the core of science skills and knowledge that students need to thrive in school and beyond. The majority of states adopted standards based on the framework as well as the NGSS. Yet because of the…

Instructional shifts required by equitable, reform-based science instruction are challenging, especially in the elementary context. Such shifts require professional development (PD) that supports teacher internalization of new pedagogical strategies as well as changes in beliefs about how students learn. Because of this complexity, many PD…

This article reports on analyses of the instructional practices of six middle- and high-school science teachers in the United States who participated in a research-practice partnership that aims to support reform science education goals at scale. All six teachers were well qualified, experienced, and locally successful--respected by students,…

A didactic sequence is proposed using an infrared puzzle and a didactic questionnaire for the teaching-learning of infrared spectroscopy at the upper secondary level. The didactic sequence that was designed was implemented in person in the subject of Chemistry IV at the high school level, corresponding to the sixth semester of the curriculum of…

Facilitating the learning of physiology by allied health majors who lack foundational coursework in biology and chemistry presents unique pedagogical challenges. By focusing on the strengths of this group of learners (team skills, interest in applied physiology), a new mechanism for conveying the primary interconnection and synergism of the body's…

A survey of 722 physics faculty conducted in 2008 found that many physics instructors had knowledge of research-based instructional strategies (RBISs), were interested in using more, but often discontinued use after trying. Considerable effort has been made during the decade following 2008 to develop and disseminate RBISs in physics as well as…