In Classroom Resources, Length, Measurement and Geometry

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.


  • 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


Curriculum Connections: NSW Syllabus Mathematics K-10 – Stage 1.2
  • 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?


For more information, please download the attached lesson plan.

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