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Investigating in Science
Developing and Communicating Scientific Understanding

Crabs

Teachers' notes
Progress indicators
What the work shows Curriculum links The learning context Where to next

What the work shows

These two drawings demonstrate the understanding William gained about crabs during a rocky shore unit. The initial drawing provided a useful formative assessment to begin the teaching. It shows that William had a very basic understanding of the structure of a crab: round shell, legs sticking out the side, and eyes on stalks. His final annotated drawing shows considerable progress.

This exemplar could be used with students to develop criteria for observation or to assess their understanding of the structure and function of crabs.

William's “before” view William's “after” view

William's "before" view

William's "after" view

 

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Progress Indicators

Investigating in Science

Exploring a situation
William makes observations and looks for patterns and relationships, with prompting as needed.

Reporting
William reports on his investigation in an organised way. He describes the features of his crab, referring to his observations.
(Note that crabs only have four sets of walking legs and one pair of nippers called chelipeds.)

Developing and Communicating Scientific Understanding

Using scientific ideas in constructing explanations
William offers explanations for his experiences using some scientific ideas. He is able to explain his observations with some understanding of the scientific ideas related to his experiences, such as the trip to the rock pools, and he uses drawing as a simple aid in his explanation.

Using scientific vocabulary
He uses correct labels of crabs.


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