Children read, write and recognise all metric measures for length, mass and capacity. They may need to be reminded the difference between capacity (the amount an object can contain) and volume (the amount actually in an object). They develop their estimation skills in context and decide when it is appropriate to use different metric units of measure.
Which units measure length? Mass? Capacity?
When would you use km instead of m?
When would you use mm instead of cm?
Which is the most appropriate unit to use to measure the object?
Explain your answer. Why do you think _____ is not an appropriate estimate?