This study explored students' perceptions of instructional practices of international teaching assistants (ITAs) who did and did not participate in additional professional development through a Teaching Methods course. The study also sought to understand the components of the Teaching Methods course that supported ITAs in inquiry-based chemistry…

This study aimed to identify the needs of a 10th grade congenitally blind student in an inclusive chemistry classroom and design and develop tactile materials to teach the 'energy in living systems' topic with particular emphasis on covering the symbolic language of the chemistry. A single case study design was used to carry out an in-depth and…

Laboratory experimentation in the context of school science is a widely advocated teaching strategy for the simplification of several abstract scientific concepts. Laboratory-based learning activities have proven to enhance learners' conceptual and procedural understandings of micro chemical phenomena, thus boosting achievement in chemistry…

This paper describes analysis of teaching instances that are part of an in-service preschool teachers programme about chemistry and physics in preschool. The aim is to develop knowledge about the communication established between teacher and children in relation to an object of learning, specifically the role of intersubjective communication in…

We report here a teacher action research project in which a Systems Thinking approach was implemented into a 15 h Depth Study for students in their final year of secondary chemistry. Students were introduced to the concept of Systems Thinking and the use of systems maps, along with the United Nations Global Goals for Sustainable Development…

This study aimed to understand teachers' classroom practices using computer-based simulations (CBS) when teaching electrolysis. The study was framed by the Consensus Model of Pedagogical Content Knowledge. Convenience and purposive sampling were used to select three experienced chemistry teachers from three schools in Eswatini (Swaziland).…

Comprehension of the 3D structure of objects usually represented in 2D is a critical part of understanding molecular geometries. The frequency with which students actually get hands-on with 3D molecular structures is often limited to a singular laboratory session. We sought to develop a set of molecular shapes that were inexpensive enough not only…

A low-cost and simple setup to measure the densities of liquids is introduced herein. The results and reliability of this setup were evaluated for pure liquids, water-ethanol binary mixtures, and aqueous NaCl solutions. The constructed densitometer provided density values with acceptable relative errors (less than ±3.0%), which were compared to…

Pre-service chemistry teachers should have the 21st century competence such as critical thinking skill. Unfortunately, the critical thinking skill dan self-efficacy level of Indonesian pre-service chemistry teachers is still low. Problem Based Learning (PBL) model and Inquiry model have been implemented widely to improve the critical thinking…

The internet is prevalent in society today, and user-friendly web-based productivity tools are readily available for developing diagnostic instruments. This study sought to determine the affordances of a web-based diagnostic instrument on ionisation energy (wIEDI) based on the pen-and-paper version, the Ionisation Energy Diagnostic Instrument…

Situated within the CID (Communication in the Disciplines) theoretical framework that promotes the focus of communication instruction on the oral genre standards of effectiveness, and employing a transdisciplinary approach, the current study explores science students' attitudes and motivation concerning an oral skills development (OSD)…

The didactic sequence relates atomic structure concepts (matter structure) with the different models that have been proposed to improve its study, making use of didactic elements that are related to students' reality where they become responsible of constructing knowledge by means of significant learning. Results were analyzed with Hake's gain…

This dissertation is a case study of a school district in the Pacific Northwest that developed three-year high school science curricula using a Physics First course sequence (Physics, Chemistry, Biology), with the crosscutting concept "Patterns" as the central theme of the courses. The purpose of the study was to examine the impact of…

This technology report aimed to explore preservice chemistry teachers' perception of mobile augmented reality (MAR) assisted chemical education. To this end, 15 participants were recruited from a Chinese university. They were provided access to an MAR chemistry learning app, Elements 4D, on their own mobile computing devices, and were instructed…

A Sonogashira experiment was transformed into a problem-based learning platform for third-year undergraduate students. Given a target that could be synthesized in a single step, students worked in groups to investigate which method was the best for large-scale production. Through this practical scenario, students learn to conduct a literature…