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…

The research aims to: (1) produce a computer program as a learning resource on gas law topics; (2) determine the appropriateness and quality of the computer program; and (3) describe the effectiveness of the computer program to help students in learning the concept of gas law. We employed 4D (define, design, develop, disseminate) models in this…

In recent years, calls for the adoption of inquiry-based pedagogies in the science classroom have formed a part of the recommendations for large-scale high school science reforms. However, these pedagogies have been problematic to implement at scale. This research explores the perceptions of 34 positively inclined early-adopter teachers in…

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…

Visual representations are a familiar element of daily life and particularly beneficial as illustrations in science textbooks. In this case, learners draw on human dimensions such as cognitive style (CS) and prior knowledge (PK) when engaging in visual thinking. This study aimed to compare and explore the relationships among the format aspect…

Currently, the number of smartphones with an embedded gyroscope sensor has been increasing due games whose performance relies on 3D augmented reality. In general, teaching papers on the gyroscope sensor address very simple spatial configuration, where the fixed rotation axis coincides to the z-axis of the smartphone. This work presents five…

Understanding the nature of science has long been a focus of science education reform efforts, including the Next Generation of Science Standards. Students' views about the process of how scientific knowledge is acquired has been shown to affect their ability to learn scientific concepts. Integrating the nature of science into science lesson plans…

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…

Increasing emphasis on students' understanding of the practices of science and engineering necessitates that teachers themselves possess a strong understanding of these practices. Unfortunately, a teacher's potentially limited engagement in science and engineering practices throughout his or her own education may impede his or her understanding of…

The real power of calculus is revealed when it is applied to actual physical problems. In this paper, we present a calculus inspired physics experiment suitable for high school and undergraduate programs. A model for the theory of the terminal velocity of a falling body subject to a resistive force is developed and its validity tested in an…

This study was intended to investigate students' cognitive and attitude of secondary school in learning global warming using Student Team Achievement Division (STAD) based on gender. This study was conducted at one of bilingual boarding school in Bandung. This study uses the quasi-experimental method with matching pretest-posttest comparison group…

The study investigated the effect of a Target-Task Approach on the performance of advanced level chemistry students in electrochemistry. The study adopted the quasi-experimental research design. Data were obtained from two advanced level chemistry classes from two high schools in Gweru, Zimbabwe. One of the two classes was assigned to be the…

Fieldwork has always been an important component in the teaching of ecology in England's secondary schools where it has been delivered almost exclusively as part of the biology curriculum for nearly 70 years. However, historical evidence shows that both the quantity and quality of ecology fieldwork has been declining in recent decades at a time…