Aspects of Technology
 : Hei Huaki Ipu – Jar Opener
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Approach: One to one

304Kb
Focus: Investigating and evaluating design
Resources:   Jar opener, jar with lid firmly screwed on
Kupu: kauwhiti = lever
Questions/instructions:
Hoatu te ipu me te taputapu huaki ipu ki te äkonga.

He taputapu tënei hei tango atu i te taupoki o tëtahi ipu. Tangohia, tirohia, rawekehia, whakamahia hei tango i te taupoki o tënei ipu.

Tukuna he wä mahi.		 Give student opener and jar.

This is an opener for helping to get the lids off jars. You can pick it up and have a good look at it. You can also try using it on this jar.

Allow time.		 jar opener
1. He aha ngä tino ähuatanga o te hanga o tënei taputapu e pai ai te tango i te taupoki o tëtahi ipu? What is special about the design of the opener that helps open jars?
2. He ngäwari ake te tango taupoki mä te whakamahi i tënei taputapu, tërä i te whakamahi noa i ö ringaringa. He aha ai? Tell me why it could be easier to open a jar using this tool rather than using your hands.
 
% responses
Teeth - to grip lid, hold it tightly:
feature and use
42
feature or use
35
Its materials – to make it strong:
feature and use
2
feature or use
0
Includes provision for a wide range of lid sizes:
feature and use
13
feature or use
2
Leverage action gives opening power:
feature and use
0
feature or use
0
Padded handles - aid comfort/strength of grip:
feature and use
6
 
feature or use
19
Hook for levering off lids:
(e.g. Agee lids)
4
3. He momo taputapu motuhake tënei. Ka kïia he kauwhiti. He aha tëtahi atu taputapu e whakamahi ana i te kauwhiti? The jar opener is a special type of tool called a lever. Can you think of another tool at home that works like a lever?
Appropriate lever given:
yes – can opener (only)
62
yes – same type as jar opener (pair of levers hinged at fulcrum)
4
yes – other type of lever
11
no
23
 
Total score:
5–9
36
 
4
24
3
19
2
8
1
7
0
6
Commentary:
Most students identified the importance of the teeth and could suggest another tool that worked like a lever but had little success in identifying and explaining the design features.
 
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