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Several researchers have noted how children's whole number schemes can interfere with their efforts to learn fractions. An Australian study found that children who were successful with the solution of rational number tasks exhibited greater whole number knowledge and more flexible solution strategies. Behr and Post (1988) indicated that children needed to be competent in the four operations of whole numbers, along with an understanding of measurement, for them to understand rational numbers. This paper describes a "hands on" approach developed by researchers that focuses on the use of paper folding, fraction walls and number lines to develop an understanding of fractions using a measurement model. (Contains 8 figures.)

A critical incident is a situation or event that holds significance for learning, both for the students and teachers. This paper presents four examples of critical incidents from a Year 7 teacher's lesson excerpts in Indonesia involving teaching of fractions, to show how they shaped classroom situation, brought forward elements of conflict, and created learning opportunities. Three examples are drawn from the lesson using a web-based applet (Examples 1, 2 and 3). The illustration of these critical incidents will be followed by a discussion on how to harness them in order to develop students' understanding or be used as a challenge as well as a learning process for teachers. This paper highlights the effectiveness of a web-based applet for displaying pictorial representations in an interactive manner.

The term "quantitative literacy" is used in this article to reinforce its importance in catering for reform-based curricula in Australia. The medium chosen for the problems discussed in this paper is the newspaper. The purpose of this article is to tie together traditional views of the importance of problem solving with the current aims of numeracy and quantitative literacy. In doing this, the author considers another angle on the development of quantitative literacy. Watson (1997) suggested a hierarchy for the related field of statistical literacy, which is easily adapted in the wider milieu. The hierarchy suggests three tiers or steps in the development of the goal of quantitative literacy: (1) The terminology needs to be understood; (2) This terminology then needs to be understood within the social (or scientific) context in which it is used; and (3) There needs to be a critical awareness that prompts questioning of claims in context that are made without proper justification. (Contains 5 figures.)

An event based on "find the rule" problems has been part of the University of Canberra Maths Day since 1985. In this paper, the authors describe the Swiss event, its context, its aims, its logistics, and gives examples of problems used in past events. The type of problems used, how they are used in an event at the maths day, and how the event evens out the competition and stops strong schools dominating are also discussed.

In this paper, the authors describe the initial stage of developing a framework designed to support out-of-field, less experiences or isolated mathematics and science teachers to make decisions about the use of resources in their teaching. The process highlighted the complexity and extent of the knowledge on which expert teachers draw in making such decisions and thus underscored the enormity of the task of teaching out-of-field. The eventual product, the Science, Technology, Engineering and Mathematics: Critical Appraisal for Teachers (STEMCrAfT) framework has proven useful not only for the target audience, but also as a tool for colleagues who take on a mentoring role. The authors begin with a brief description of teacher knowledge before describing the project and then presenting what they unearthed about expert teachers' thinking and knowledge.

The learning sequence described in this article was developed to provide students with a demonstration of the development of box plots from authentic data as an illustration of the advantages gained from using multiple forms of data representation. The sequence follows an authentic process that starts with a problem to which data representations provide the solution. The advantage of using box plots is that they allow clear and efficient comparison of related data sets. In this case, students are given a maze on paper and timed while they complete it. This produces the first set of data. They then attempt the maze again, expecting that their time to do this will decrease. The need to compare these two data sets arises from the question, "Did the group improve their maze times on their second attempt?"

This paper explores how a secondary school in western Sydney used educational research as an impetus to change its mathematical education culture over a three year period. Key changes occurred in four areas: leadership; pedagogy; structures for teaching and learning; and mathematical environments. These included increased professional conversations, adoption of a numeracy lesson structure, regular use of manipulatives and open ended tasks and a structured intervention program for mathematically vulnerable students. Critical to the development of these changes were partnerships with a university academic and the CEDP system leadership team as well as school leadership participation in professional learning.