We have developed a curriculum for the organic chemistry laboratory in which students draw on authentic usage of spectroscopy, spectrometry, and computational chemistry to explain chemical phenomena. This curriculum, which has been continuously refined over a decade, has been explored by many thousands of students and is scalable to small and…

Educational kits can improve the teaching of experimental sciences, providing an interesting strategy to be explored at home, especially during the COVID-19 pandemic. In this sense, chemistry kits based on a microscale design were developed encompassing safety, portability, efficacy, and low cost. They were successfully applied in regular classes…

Changing where, when, and how objects are studied is central to lab-based science (Knorr Cetina, 1999). Science involves changing the scale of objects--particularly scales of size, time, and intensity--from what is experienced in the world. Similar to investigations conducted in science laboratories, classroom investigations involve…

This study investigated how pre-service biology teachers perceived the concepts of 'system' -- as the basic component of the systems thinking approach -- and 'biological system' specific to biology. The most important characteristics of a system appear as elements, interactions, interconnections, hierarchy, purpose and forming a whole. The data of…

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…

Scientific literacy is still being identified and recognised as one of the main goals of science education. However, this concept has multiple interpretations and its definition changes continuously depending on its social, cultural, and political contexts. In this paper, scientific literacy is conceptualised through "visions I, II and…

Since 2010, a remarkable number of literature reviews on teacher identity has been published. These literature reviews address a wide range of different foci, e.g., school teachers' identity, higher education teachers' identity, or the identity of teachers teaching a specific subject such as science. So far, these literature reviews have not been…

Ethanol (EtOH) is among the most consumed drugs in the world. The behavior of humans after ingestion of this drug is characteristic: At low doses it may be excitatory and at higher doses, it may induce depressant/sedative effects. Similar effects are observed in the zebrafish experimental model ("Danio rerio"), which has about 70%…

Many middle school students come to Computer Science (CS) classes without any previous CS instruction or any Computational Thinking (CT) skills that are needed to be successful. To overcome this, many curriculums and programming environments have been used to engage students and to instill a love of CS. Which curriculum should be used to develop…

Although research demonstrates the key roles practical experiences play in teachers' learning to notice, few studies have examined teacher noticing in practical contexts. This study addresses the gap by exploring prospective science teachers' (PSTs) noticing in an authentic practical setting afforded through a school-based practicum associated…

The disciplinary identity as a computer science student has recently received increasing attention as a well-developed subject identity can help with increasing retention, interest, and motivation. Besides, identity theory can serve as an analytical lens for issues around diversity. However, identity is also often perceived as a vague, overused…

Approximations can help to orient the student in an organic chemistry laboratory. There the student needs to develop the solvent systems for the reaction and isolation of organic reactants and products. The adage "like dissolves like" helps in this regard, but this approach is vague and entirely qualitative. More quantitative approaches…

A symmetry activity using student-built models was developed in line with faculty-developed pedagogical goals and a collaborative learning framework. The activity took place in a 3-h laboratory portion of an upper-division inorganic chemistry course. It required students to identify symmetry elements for seven molecules using common 2D…

Cyclopropane can be hydrogenated to produce propane under moderately high temperatures ([tilde]175 [degrees]C). Using a nanoparticle palladium catalyst, undergraduate students can explore the reaction and draw conclusions regarding the conditions for reaction. When deuterium is used, conclusions pertaining to the reaction mechanism are possible.…

The helium-plasma (HePI) ionization mass spectrometry method was used to track the formation of reaction products and consumption of reactants by continually monitoring the vapors in the reaction headspace in real time. Two examples of the application procedure are presented here: a nucleophilic acyl substitution reaction and a 1,4-nucleophilic…