The need for renewable and non-fossil fuels is now recognised by nations throughout the world. Consequently, an understanding of alternative energy is needed both in schools and in everyday life-long learning situations. This study developed a two-tier instrument to diagnose students' understanding and alternative conceptions about…

The aims of this study were to determine the underlying conceptual structure of the thermal concept evaluation (TCE) questionnaire, a pencil-and-paper instrument about everyday contexts of heat, temperature, and heat transfer, to investigate students' conceptual understanding of thermal concepts in everyday contexts across several school years and…

A thorough understanding of chemical bonding requires familiarity with the particulate nature of matter. In this study, a two-tier multiple-choice diagnostic instrument consisting of ten items (five items involving each of the two concepts) was developed to assess students' understanding of the particulate nature of matter and chemical bonding so…

Over the past two decades, several two-tier multiple-choice diagnostic tests in science at a variety grade levels have been reported in the extant literature from several countries. This review summarises these studies, provides an overview of the methodology for their construction, presents two examples of typical items, and lists studies…

In this article, we discuss several aspects of the national project, the National Science Concept Learning Study, designed to assess elementary, middle, and secondary students' conceptual understanding in science. After a short introduction to provide some history of the project, we describe the processes used in the integrative study, the…

In this final article, we briefly review and synthesize the science and language research and practice that arose from the current literature and presentations at an international conference, referred to as the first "Island Conference". We add to the synthesis of the articles the conference deliberations and on-going discussions of the field and…

It is widely recognized that lectures continue to dominate college chemistry instruction, especially in developing countries, and that lectures limit student intellectual engagement. To address this concern, a General Chemistry course in a Philippine university was reconstructed to implement an instructional cycle consisting of three phases: a…

Educators and policymakers envision the future of education in Egypt as enabling learners to acquire scientific inquiry and problem-solving skills. In this article, we describe the validation of a model for problem solving and the design of instruments for evaluating new teaching methods in Egyptian science classes. The instruments were based on…

The purpose of this study was to investigate the levels of energy literacy among 276 Form 2 (Grade 8) Malaysian students as no similar study has been previously conducted in the country, as well as the contribution of students' energy-related knowledge and attitudes on their energy-related behaviors. This was a non-experimental quantitative…

This study was conducted with 330 Form 4 (grade 10) students (aged 15-16 years) who were involved in a course of instruction on electrolysis concepts. The main purposes of this study were (1) to assess high school chemistry students' understanding of 19 major principles of electrolysis using a recently developed 2-tier multiple-choice diagnostic…

This study was a mixed quantitative-qualitative research to evaluate the efficacy of a designed student-centred instructional (DSCI) program for teaching about acids and bases. The teaching innovation was designed based on constructivist, hands-on inquiry and context-based approaches and implemented in seven 45-min lessons with a class of 36 grade…

Chemistry is commonly portrayed at three different levels of representation--macroscopic, submicroscopic and symbolic--that combine to enrich the explanations of chemical concepts. In this article, we examine the use of submicroscopic and symbolic representations in chemical explanations and ascertain how they provide meaning. Of specific interest…

Discusses how conceptual change has developed over the past three decades, alternative approaches for analyzing it, multiperspective views of science learning and instruction, how conceptual change can be used to examine scientific literacy, and paths to a powerful framework for improving science teaching and learning. (Contains 91 references.)…

This paper reports on the understanding of three key conceptual categories relating to the kinetic particle theory: (1) intermolecular spacing in solids, liquids and gases, (2) changes of state and intermolecular forces and (3) diffusion in liquids and gases, amongst 148 high school students from Brunei, Australia, Hong Kong and Singapore using 11…

Discusses the development and evaluation of an instrument to measure secondary students' understanding of scientific models. Involves (n=228) secondary science students and identifies five themes of students' understanding of scientific models including scientific models as multiple representations, models as exact replicas, models as explanatory…