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Learning to work confidently with decimal numbers is an important part of numeracy, needed in all walks of life. It is however difficult to master. This resource for teachers explains the mathematical, psychological and pedagogical ideas needed to effectively teach this topic. It draws upon extensive research carried out at the University of Melbourne and by researchers across the world. The resource is based around how students interpret decimal notation. The Decimal Comparison Tests enable quick diagnosis, around which targeted teaching can be built. Difficulties in interpreting decimal notation are a root cause of trouble with all decimal arithmetic operations, as well as rounding, working with significant figures and generally making sense of mathematics.

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Guide to Contents
Take Guided Tours
	Guided Tour of Case Studies Meet six students possibly just like yours..... they all think differently about decimals and they all have important ideas to learn.
	Guided Tour of Teaching Find out how to help your students.... Lesson ideas for Years 4 to 10. Photocopy masters, FAQ, models.
	Guided Tour of Test Print out tests for diagnosing misconceptions and checking skills. Research data for monitoring results.
	Guided Tour of Background Survey of mathematical ideas which contribute to understanding decimals. History. Fascinating facts.
	Guided Tour of Find Glossary of technical words. Reference list. Some full text articles.
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