The focus of this activity is to find out what students know and understand about length. By Year 2 students need to begin to move beyond a familiar definition of length and must begin to see the importance of using uniform units.

##### Purpose
• Recognise and explain different ways we measure
• Develop an accurate definition of length
• Explain how and when we measure length
• Recognise the different materials used to measure length
• Explain how the different measurement tools are used
• Recognise and explain the different between units, e.g. uniform and non-uniform units, formal and informal units
• Choose appropriate materials to estimate and measure the length of objects
• Compare the length of objects and explain which is longer/shorter/equal to, etc.
• Order a set of objects according to their length
• Apply what we have discovered to help us estimate the length of different objects

##### Length
• Compare and order several shapes and objects based on length, using appropriate uniform informal units(ACMMG037)

##### At the end of this lesson students should be able to answer the following questions
• What are the different ways me measure?
• What is length? How do we measure length?
• What are some examples of length?
• What are some different materials or tools we can use? How do we use these tools?
• Why do we estimate? How can estimating help us?
• How can we compare the size of objects?
• How can we check to ensure our comparisons are correct?
• What is the standard unit for length? What is the relationship between the units?