Chemistry is a science that not only examines substances at different levels of abstraction and involves a wide multitude of cognitive and experimental operations, but also used and uses a variety of concepts and representations referring to the same term. At the same time, many studies on the professional competencies of teachers underline the…

This study considers the concept of observer--the fundamental concept axial for fundamental physical theories. The history of the observer concept in physics is reviewed and summarized. In the following, the observer concept is considered with regard to science education where scientific concepts should reflect their status in science. This…

Climate change decision-making happens at the intersection of knowledge, values, and experience, usually requiring action with incomplete information. Yet, climate change education prioritizes improving knowledge gaps, not communication and contextual understanding. Role-playing games highlight the interaction of evidence and values in…

Paal--Knorr reactions are a classical method for synthesizing pyrroles, using 1,4-dicarbonyl compound and amine as reactants. It has the characteristics of green chemistry, as only two molecules of water are lost. In this teaching and learning experiment, 2,5-hexanedione and 4-"tert"-butylaniline were used to synthesize…

This study aimed to examine the implementation of science curriculum focusing on secondary schools in Ethiopia. To achieve this, a mixed-methods research approach, with a convergent parallel design, was employed. Using simple random sampling and comprehensive sampling techniques, 240 science teachers, 60 school leaders and 320 students from 20…

The area of application of electrospray ionization mass spectrometry (ESI-MS), usually coupled with liquid chromatography, seems to be much larger than those of any other ionization method. It gives rise to the demand for new teaching methods that would effectively help students to master the principles of working with and making full use of the…

We describe an intentionally designed, cross-disciplinary curriculum that promotes a broad humanistic understanding of the process of science, and how this curriculum supported graduation in science and mathematics. Combining the expertise of philosophers, sociologists, and social psychologists with that of scientists, this cross-disciplinary…

The BSCS 5E Instructional Model, an elaboration of the well-known and accepted three-part learning cycle, is a five-part approach to incorporating inquiry-based, active learning in the classroom. Developed in 1987 by the Biological Sciences Curriculum Study, "the 5Es" is a popular K-20 instructional practice, and as such, the Biological…

Reformed science curricula provide opportunities for students to engage with authentic science practices. However, teacher implementation of such curricula requires teachers to consider their role in the classroom, including realigning instructional decisions with the epistemic aims of science. Guiding newcomers in science can take place in…

Curriculum reform worldwide has often reflected changing perspectives on the teaching and learning of science. Such perspectives underline the notion that not only the teaching of science content knowledge is relevant but also the aims and methods scientists use to further their knowledge and the social context in which science is applied. We call…

Engineering education has slowly been making its way into schools with the aim of promoting engineering literacy, which is central to learning and working in a technology-oriented society. Educators and policy makers advocate the need for developing students' understanding of the nature of engineering (NOE); yet, there is an ongoing debate on the…

This study validated an instrument for measuring student engagement in the context of Chinese science curriculum reforms. We adapted existing items from well-designed instruments with the context of science learning and formed the initial instrument of the Student Engagement in Science Learning (SESL) consisting of 20 items in four subscales,…

Understanding randomness is essential for modern life, as it underpins decisions under uncertainty. It is also an essential part of both the mathematics and science curricula in schools. Yet, research has shown that many people consider randomness difficult to perceive and argue about, with a number of different and contradictory views on the…

As the 21st century progresses, we are increasingly reminded of the importance of and need for green chemistry, which also leads to the corresponding need for green chemistry education. The UC Berkeley Department of Chemistry developed a green chemistry laboratory curriculum-the "General Chemistry Green Curriculum" ("GC[superscript…

Practical work in optics is essential to understand complex abstract phenomena. Consequently, hands-on experiments are part of most physics' curricula, despite the fact that they can be hard to set up and maintain. In this article, we present a virtual laboratory tool, called SHIRE, which allows students to carry out optical experiments from a…