This PowerPoint was created with explicit instruction in mind. It will help teachers present information, develop concepts, demonstrate processes and revise. The language is concise. The graphics are relevant and eye-catching.

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Focus

• recognise that length is the distance from one point to another
• use a given strategy to measure objects using non-standard units
• explain why more short units than long units are needed to measure the same length
• recognise the limitations of using non-standard units
• establish benchmarks for centimetres and metres and identify situations where they could be used to measure length
• use a centimetre ruler (displaying whole and half units) to measure length
• use a 1 m piece of string, with knots at ¼ m, ½ m and ¾ m to measure the lengths of large objects