Over the past half-century, numerous attempts have been made to derive the centripetal acceleration formula by treating circular motion as a superposition of uniform and accelerated rectilinear motions over short time intervals. Critical examination reveals that these methods are manifestations of the same approach pioneered by Huygens to…

Representational pluralism is a perspective that acknowledges that it is normal and even desirable in some circumstances to hold incompatible representations in one's mind regarding a natural phenomenon. This pluralist perspective has been defended in cognitive science, psychology, philosophy of science and science education, raising several…

While some researchers argue that theories and abstract knowledge are unreliable bases for teachers' work, a wide range of research stresses the need to overcome the gap between theory and practice, or abstract academic knowledge and experience-based knowledge. Here, Silvia Edling maintains that it is relevant to ask why the relationship is…

It has long been suspected by general relativists that physicists who do not specialize in general relativity (GR) believe that special relativity (SR) is incapable of modeling dynamics within accelerated reference frames. Consequently, many physicists may conclude that certain phenomena, such as time dilation due to acceleration, can only be…

Developing an adequate understanding of the nature of science includes developing an understanding of the uses and importance of models in science. General accounts of science aimed at university students, however, tend to neglect this aspect. A noticeable exception is the simple model of the key elements of a scientific result presented by Giere,…

In this article, we tackle the phenomenon of what seems to be a misunderstanding between science education theory and philosophy of science--one which does not seem to have received any attention in the literature. While there seems to be a consensus within the realm of science education on limiting or altogether denying the explanatory role of…

In 2006, after receiving the Division 15 Career Award, Alexander delivered a keynote address entitled "Evolution of a Learning Theory: A Case Study." This presentation was a clarion call for greater respect for and attention to scientific speculation in educational psychology as a critical component in theory building. To build her case,…

The statics of fluids may seem simple at first but often poses problems for students when it comes to applying it to concrete cases. Despite its relatively simple laws, some subtleties, mainly related to the elastic characteristics of a fluid, must be noted. This elasticity allows the pressure exerted in a part of the fluid to propagate in its…

This paper has a pedagogical aim. Indeed, by using the relativistic velocity-addition and Einstein's equivalence principle (EEP), we want to analyse in a simple way the physics of time on a rotating non-inertial frame. We use a didactic approach considering four friends. The first is in the laboratory, the second at rest on the disk at radius r,…

It has been shown that many people do not understand how scientific knowledge is built and accepted, even after scientific education. One way to deal with this problem is through teaching about the Nature of Science (NOS). NOS can be understood as a pedagogical construct aiming to foster the understanding of the main characteristics of scientific…

In this article, a guide is presented to help biology teachers so that they can process the subject of the eye and eye defects with an interdisciplinary approach. The guide, which was created by considering the stages of a lesson plan, includes content information, suggestions, and various directions that can help the teacher at every stage. The…

The notion of function is central in all of the secondary curriculum, and indeed functional models appear in almost all higher education that is based on mathematics. However, in secondary education, functions usually appear in restricted and somewhat sterile forms. In this (mostly theoretical) paper, we present a proposal -- exemplified by a…

The family resemblance approach to nature of science is receiving increasing attention by science educators since its inception about a decade ago. Many scholars of science education have contributed and continue to contribute to it not only theoretically but also by applying it empirically to a wide range of areas such as curriculum and textbook…

Interfacial, or surface tension, is a significant topic in chemical education. This paper describes the directional motion of gallium-based liquid metal drops, resulting from a difference of interfacial tension across the drop. This demonstration can engage students in discovering the underlying chemical principles. A mechanism for the drop's…

Gravity bends light. One can argue this by reasoning that a beam of light should travel in a curved path when viewed from within an accelerating frame of reference, and then invoking Einstein's principle of equivalence, which asserts that the effects observed in an accelerating frame of reference are indistinguishable from the effects observed in…