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| Questions/instructions: | ||||||||||||||
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%
responses
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y4
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y8
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1.
Write the measurements of the Pebbles packet to show how long,
high and wide it is.
|
Length: |
141–149 (mm)
|
32
|
70
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| Width: |
42–53
(mm)
|
47
|
80
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| Depth: |
17–23
(mm)
|
27
|
63
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| Units given: |
all
3
|
55
|
54
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1
or 2
|
18
|
26
|
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| 2.
Work out and write down the volume of the Pebbles packet. |
Correct,
given student’s measurements:
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with
correct units
|
•
|
12
|
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without
correct units
|
•
|
12
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incorrect,
but with correct units
|
•
|
5
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all
other responses
|
•
|
71
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3.
This box holds 10 packets of Pebbles. Write the measurements on
the box to show how long, high and wide it would be.
|
length
= length above
|
•
|
24
|
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width
= width above
|
•
|
27
|
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depth=
10 x depth above
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•
|
31
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Units
given:
|
all
3
|
•
|
42
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1
or 2
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•
|
24
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| 4.
Work out and write down the volume of this big box. |
10
x volume above
|
•
|
15
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|
calculated
correctly from student’s measurements
|
•
|
8
|
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correct,
but method unclear
|
•
|
9
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| Commentary Year 4 students were asked part 1 only. About 35 percent more year 8 than year 4 students measured the box dimensions accurately though both years used appropriate units equally well. Only about 30 percent of year 8 students succeeded with volume calculations. The poor result for part 3 may suggest confusion for some students. Results may have been better if the first sentence read; “This box holds 10 of these packets of Pebbles.” |
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