Preceding even the Hartree-Fock method, molecular integrals are the very foundation upon which quantum chemical molecular modeling depends. Discussions of molecular integrals are normally found only in advanced and technical texts or articles. The objective of the present article is to provide less experienced readers, or students in a…

The Pauli exclusion principle is a key postulate of the quantum theory and informs much of what we know about matter. In terms of electronic structure, the lone, deceptively simple mathematical requirement is that the total wave function be antisymmetric with respect to the exchange of any two electrons. However, visualizing the effect on the…

Open-ended problems are a very effective tool for engaging student interest. In this paper, we report a physics activity that provides insight into the lifestyle of theropod dinosaurs. This activity generates great enthusiasm among the students since virtually everyone is interested in dinosaurs. In the spirit of the "spherical cow"…

The acceleration of a vehicle or a bicycle is commonly used in elementary physics courses to illustrate problems concerning Newton's laws of motion when friction forces are involved. The maximum possible acceleration is rarely discussed, although it is of interest to consumers and racing car enthusiasts, and it is sometimes questioned by students.…

Research shows that energy is a concept that is difficult to understand despite different teaching approaches existing. One of the problems is seen in its rather abstract definition. In contrast, we present an approach that activates students' everyday life experiences and uses these to develop a scientific understanding by introducing energy as a…

Recently, many scientists and science advocates have taken the responsibility to mobilize for the sake of science. With fake news or "alternative facts" on the rise, many scientists and science supporters are determined to protect the credibility of science and promote evidence-based policy-making. At the core of these mobilization…

Conducting scientific inquiry is expected to help students make informed decisions; however, how exactly it can help is rarely explained in science education standards. According to classroom studies, inquiry that students conduct in science classes seems to have little effect on their decision-making. Predetermined values play a large role in…

The relationship between physics and mathematics is reviewed upgrading the common in physics classes' perspective of mathematics as a toolkit for physics. The nature of the physics-mathematics relationship is considered along a certain historical path. The triadic hierarchical structure of discipline-culture helps to identify different ways in…

Science museums are increasingly being recognized as sites for teacher education. In museums, teachers can develop content knowledge, learn new instructional approaches, gain confidence in teaching science, and develop ideas for how to use museum resources in their classrooms. Despite these reported benefits, little is known about the specific…

The objective of this examination was to determine if there were significant differences in reported levels of motivation across five teaching tasks, as well as time allocated to each teaching task, among online and onsite university-level social science faculty. One hundred thirty-six social science faculty members were allocated into two groups…

Teachers lack effective curriculum-based instruments to assess their students' scientific competence that would provide information for modifying their inquiry instruction. The main purpose of this study was to develop and validate a Curriculum-Based Scientific Competence (CBSC) test to assess students' scientific competence in a 1-semester Grade…

As introductory college science courses transition from large, passive lectures to more student-centered active learning environments, additional instructional support may be needed. Peer Learning Assistants (PLAs) can aid course transformations by helping facilitate active learning and peer engagement among students in the classroom. Pedagogical…

Training in chemistry is essential for undergraduate medical students; however, at the National University of Colombia, basic chemistry courses are associated with high fail rates and low academic performance with regard to first semester students, especially in vulnerable special admission populations. A longitudinal study was carried out via…

Despite national curricula and instructional reforms calling for collaborative problem-solving skills (CPS), however, there is an absence of a theory-laden model showing how to effectively construct CPS for science learning. We therefore developed and validated a simulation-based CPS model that exploits its constructs, sequences, and causal…

Background: Effective teaching of university chemistry in an online environment not only requires teachers to have specific discipline content knowledge; it also requires them to have knowledge and skills in technology-enhanced teaching practices. When transitioning from traditional face-to-face teaching into online contexts, teachers must learn…