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| Questions/instructions:
Do not let the student see a ruler or the measuring tape until it is time to make the actual measurements. In this activity I am going to ask you to estimate or guess the length of some things. After that, you can measure them to check your estimates. I’ll write down the measurements you tell me. Each time, tell me if the measurement is in millimetres, centimetres or metres. One at a time, introduce each of the objects in the order given. Ask student to estimate all of the objects before they are measured. Write student’s answers for each measure. |
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%
responses
2001 '97 |
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y4
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y8
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| Hand
student the bolt. [70mm] 1. How long do you think this is? Prompt: What are the units of measurement? Record student answer. |
56–84mm
|
26
(27)
|
42
(38)
|
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|
42–55mm
or 85–98mm
|
20
(25)
|
29
(32)
|
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| Hand
student the pencil. [144mm] 2. How long do you think this is? Prompt: What are the units of measurement? |
115–173mm
|
20
(26)
|
36
(38)
|
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|
89–114mm
or 174–203mm
|
35
(35)
|
41
(40)
|
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| Hand
student the stick. [302mm] 3. How long do you think this is? Prompt: What are the units of measurement? |
240–360mm
|
33
(34)
|
63
(63)
|
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|
180–239
or 361–420mm
|
19
(23)
|
20
(23)
|
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| Hand
student the ribbon. [400mm] 4. How long do you think this is? Prompt: What are the units of measurement? |
320–480mm
|
23
(24)
|
50
(44)
|
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|
260–319
or 481–560mm
|
20
(24)
|
28
(35)
|
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| 5.
Now how tall do you think you are? Prompt: What are the units of measurement? |
Closeness
to teacher’s measurement in question 6:
|
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|
within
20%
|
45
(39)
|
74
(78)
|
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|
within
20–40%
|
14
(10)
|
7
(9)
|
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| Give
the student the ruler (not the measuring tape). Now I want you to use this ruler to measure the length of each of the four things. As you measure them, tell me what the length is, and I’ll write it down. Remember to tell me the unit of measurement. |
•
bolt
|
65–75mm
|
79
(79)
|
95
(97)
|
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|
•
pencil
|
130–150mm
|
87
(88)
|
98
(98)
|
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|
•
stick
|
290–310mm
|
91
(93)
|
98
(99)
|
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|
•
ribbon
|
390–410mm
|
51
(56)
|
89
(93)
|
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| Now
let’s see how tall you are. Have student stand against a wall. Place a piece of tape on the wall to show the height. Give student the measuring tape. 6. Now measure your height and tell me how tall you are so I can write it down. Remember to tell me the unit of measurement. Record student answer. Check student’s measurement and record actual height. |
within
3cm
|
69
(76)
|
73
(77)
|
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Commentary: |
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