



%
responses 2009 ('05) 

y4 
y8 

1. Tell me what you think the answer is.  336  70 (63)  
2.
Now tell me how you worked it out. 

prompt: Can you explain that a bit more to me?  
explanation show understanding that the answer must be 2 lots of six (12) more than 324  56 (42)  
another valid strategy that made use of information that 54 × 6 = 324  5 (10)  
tried to directly calculate 56 × 6 (i.e. did not make use of 54 × 6 = 324)  14 (18)  
any other response, including unclear explanation  25 (30)  
Total
score: 
4

52 (39)  
3  8 (7)  
2  13 (20)  
1  5 (9)  
0  22
(25) 
Subgroup Analysis [Click on charts to enlarge] : 
Commentary: 
Between
2005 and 2009, the percentage of year 8 students using an efficient
number strategy to solve this task increased substantially, leading
to a smaller rise in success with the task. Boys did a little better
than girls, on average, with only small differences between Pakeha,
Mäori and Pasifika students. 