The study reported in this paper contributes to the exploration of the development of children's mathematical drawing. 36 preschool children produced drawings of 'something tall and something short'. Open-ended analysis of the forms and structures of the drawings revealed four categories ranging from scribble to the base-line comparison of two…

The aim of this research was to explore 11 to 12-year-old children's understanding of the mass of objects made from different materials, and the measurement of this attribute. In depth task-based interviews were conducted with six children attending six different schools; five were in Year 6 and one in Year 7. The children were found to hold…

Many children and adults have problems differentiating between heat and temperature. As a consequence, intuitive notions developed about the transfer of heat and other thermal concepts do not align with scientific explanations of the phenomena. These notions are formed as alternative conceptions, which are resistant to change and persist as…

Chemical change is a central theme of Chemistry which has itself been called the central science. This was the title of a popular American text book. I am thus putting forward the idea that chemical change is an idea central to science as a whole, so that it would be one of the ideas children should understand clearly whilst at school. This is…

This paper reports an action study of conceptual change in mechanics using an instructional strategy based on a constructivist view of learning. The aims of the study were to determine: (1) what effect the instructional strategy had on achieving conceptual change; (2) what devices or strategies students used in their attempts to understand…

The process of students' conceptual change was evaluated during a computer-supported physics unit in a Grade 10 science class. Computer simulation programs were developed to confront students' alternative conceptions in mechanics. A conceptual test was administered as pre-, post-, and delayed post-tests to determine students' conceptual change.…

The concept of physical and chemical change is far from being the clearest and most self-explanatory concept in the world. If a number of chemists are asked to define physical and chemical change, there may well appear to be a fair degree of uniformity in their answers, until a few examples are suggested. When chemists are asked to place a variety…

This paper describes the rationale for, methodology of, and some early results from a longitudinal study on science teachers' knowledge of science. Each of the participants is a university science graduate with a post-graduate university training for secondary school science teaching. The study focuses on two issues: (1) variations that occur in…

As a part of a doctoral thesis considering the history of teaching physical and chemical change, 641 chemistry/science textbooks have currently been examined. These books are from many different countries and date from the eighteenth century to the present time. The books have described a wide variety of experiments to illustrate the difference…