Rich Learning Tasks

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Rubric
Level 1 Level 2 Level 3 Level 4
The student makes
many incorrect
calculations and so
does not determine
correct sets of
dimensions.
The student does
not recognise that
multiplying both
dimensions of the
rectangle has no effect
on the fraction of the
perimeter lost.
The student does
not recognise that
different halvings result
in different perimeter
ratios.
The student does not
seem aware that longer,
narrower rectangles lose
the least perimeter.
The student determines
at least one set of
dimensions to meet
two of the required
conditions.
The student does
not recognise that
multiplying both
dimensions of the
rectangle has no effect
on the fraction of the
perimeter lost.
The student does
not recognise that
different halvings result
in different perimeter
ratios.
The student does not
seem aware that longer,
narrower rectangles lose
the least perimeter.
The student determines
at least one set of
dimensions to meet
each of the three
required conditions.
When asked, the
student realises that
multiplying both
dimensions of the
rectangle has no effect
on the fraction of the
perimeter lost.
The student does
not recognise that
different halvings result
in different perimeter
ratios.
The student does not
seem aware that longer,
narrower rectangles lose
the least perimeter.
The student determines
at least two or three
possibilities to meet
each of the three
required conditions.
When asked, the
student realises that
multiplying both
dimensions of the
rectangle has no effect
on the fraction of the
perimeter lost.
When asked, the
student realises that
different halvings result
in different perimeter
ratios.
The student explicitly
notes that longer,
narrower rectangles lose
the least perimeter.
Partial Perimeters Measurement