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134 bytes added ,  04:38, 21 February 2015
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==Prerequisites/Instructions, if any==
 
==Prerequisites/Instructions, if any==
 
==Multimedia resources==
 
==Multimedia resources==
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[https://www.youtube.com/watch?v=8sxpAzwomsE ]
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[[:File:ptr2.jpeg]][[File:ptr2.jpeg|400px]]
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[[:File:ptr3.jpg]][[File:ptr3.jpg|400px]]
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==Website interactives/ links/ simulations==
 
==Website interactives/ links/ simulations==
 
==Process (How to do the activity)==
 
==Process (How to do the activity)==

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