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I used the nrich activity as a starter activity for BTEC Level 3 students (I was observed during the lesson on a drop-in, no-notice observation and even the observer was drawn into solving the problem. The problem was solved by the majority of the class in the given time (I gave them 5 minutes to work on it in pairs) and I was pleased to find that there was a variety of ways in which students solved the problem and we were able to explore problem-solving skills as well as to discuss the use of Venn diagrams for representing logic.
The mystery task was a good team activity, again, prompting discussion about problem solving methods and sharing of ideas. The role of the venn diagram in illustrating the thinking was emphasised clearly through this task.
from karsco, 24 March 2013
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5 out of 5
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Great resource - liked all parts of this. Mystery task is thought-provoking.
from nebthenoob, 12 March 2013
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5 out of 5
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Great resource!
from andrewchambers, 10 September 2012
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5 out of 5
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I used this as a starter for AS Statistics and then lead into set notation.
from joannegray, 14 November 2011
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5 out of 5
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