2. L Wright 2006
Today we will be learning to:Today we will be learning to:
solve measurement problemssolve measurement problems
use words about mass and ways ofuse words about mass and ways of
measuring weightmeasuring weight
measure using non-standard unitsmeasure using non-standard units
compare weightscompare weights
estimate and measure.estimate and measure.
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Mental ActivityMental Activity
Imagine a spider is on number 4 of aImagine a spider is on number 4 of a
hundred square.hundred square.
Which number is below it?Which number is below it?
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Imagine a spider is on number 19 of aImagine a spider is on number 19 of a
hundred square.hundred square.
Which number is below it?Which number is below it?
Which number is above it?Which number is above it?
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Imagine a spider is on number 45 of aImagine a spider is on number 45 of a
hundred square.hundred square.
Which number is below it?Which number is below it?
Which number is above it?Which number is above it?
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Imagine a spider is on number 99 of aImagine a spider is on number 99 of a
hundred square.hundred square.
Which number is above it?Which number is above it?
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Imagine a spider is on number 34 of aImagine a spider is on number 34 of a
hundred square.hundred square.
Which number is below it?Which number is below it?
Which number is above it?Which number is above it?
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Main ActivityMain Activity
Today we are going to be finding outToday we are going to be finding out
about massabout mass
which is how heavy things are.which is how heavy things are.
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I will show you two parcels.I will show you two parcels.
Which is the heaviest?Which is the heaviest?
How could we find out?How could we find out?
What if the parcels were in a differentWhat if the parcels were in a different
room or place?room or place?
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You will now be split into six groups.You will now be split into six groups.
Each group will be given a parcel.Each group will be given a parcel.
How could you find out which is theHow could you find out which is the
heaviest parcel?heaviest parcel?
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Each group will be given a balance and
some non-standard units.
Remember to measure using the same
units.
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Which unit do you need most of?Which unit do you need most of?
Why?Why?
Which unit is the best or worst forWhich unit is the best or worst for
measuring with?measuring with?
Why?Why?
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Which parcels were the heaviest?Which parcels were the heaviest?
Did you find them all the same?Did you find them all the same?
Each parcel weighed 1kg.Each parcel weighed 1kg.
What does this term mean?What does this term mean?
Where have you heard the term before?Where have you heard the term before?
19. L Wright 2006
Group WorkGroup Work
Work in the same groups.Work in the same groups.
Draw a table of classroom objects thatDraw a table of classroom objects that
are heavier or lighter than a kilogram.are heavier or lighter than a kilogram.
heavierheavierlighterlighter
1kg
20. L Wright 2006
PlenaryPlenary
Look at the sheet showing a range ofLook at the sheet showing a range of
different scales.different scales.
What step is the scale going up in?What step is the scale going up in?
How did you work it out?How did you work it out?
What does each division represent?What does each division represent?
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Remember!Remember!
Work out what each division stands for.Work out what each division stands for.
Use what you know to work out what youUse what you know to work out what you
don’t know.don’t know.
HomeworkHomework
Find three things at home which weightFind three things at home which weight
more than 1kg and three things whichmore than 1kg and three things which
weigh less than 1kg.weigh less than 1kg.
