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Lesson 0 of 9

3 min

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You measure a desk with your hand span. A hand span is the width of your open hand. A friend gets a different number.

This track: measuring length well, and spotting motion.

This track follows your book's Chapter 5, Measurement of Length and Motion.

What you will do

  • Measure with a unit everyone shares.
  • Pick the right unit: millimetre, centimetre, metre or kilometre.
  • Read a ruler from two marks.
  • Measure a curve with a thread.
  • Find out if something has moved.
  • Name the shape of a path.

Try each idea with your hands first.