Garden perimeter

Garden perimeter

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Overview
Connecting to the Curriculum
Marking Student Responses
Working with Students
Further Resources
This task is about working out the perimeter of different sized gardens.
Katherine has three three garden beds in the māra kai. She decides to trim the grass around the edge of each one.
 

three gardens
 
a) What is the distance around the kūmara bed?
 
  (A)
(B)
(C)
(D)
(E)		 6 m
12 m
24 m
36 m
None of these. The distance around the kūmara bed is __________ m.
 
b) What is the distance around the pumpkin bed?
 
  (A)
(B)
(C)
(D)
(E)		 3 m
12 m
5 m
30 m
None of these. The distance around the pumpkin bed is __________ m.
 
c) What is the distance around the silverbeet and kale bed?
 
  (A)
(B)
(C)
(D)
(E)		 4 m
9 m
13 m
36 m
None of these. The distance around the silverbeet and kale bed is __________ m.
Levels:
3, 4
Curriculum info: 
Maths, Geometry and Measurement, Measurement
Keywords: 
perimeter, rectangles, squares
Description of task: 
Students calculate the distance around three different sized gardens.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Additive thinking, sets 6-7
Additive thinking, sets 7-8
Measurement sense, set 5
Measurement sense, sets 6-7
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
   

Y6 (11/1997)
a) C easy
b) D moderate
c) E, 26 m (need both answers to get a mark) easy
Diagnostic and formative information: 
  Student response Likely calculation Likely misconception
a)
b)
c)		 E – 36
D
D		 12 × 3
6 × 6
9 × 4		 Confuses area and perimeter.
a)
b)
c)		 C
B
C		 12 + 3
6 + 6
9 + 4		 Calculates only half of perimeter.