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New Units for Old
Age 16 to 18
Challenge Level 
Why do this problem ?
This important problem will lead to a thorough understanding, and demystification of, the various units which exist. Students will enage in a variety of problem solving strategies in its solution.Possible approach
This question initially appears to be quite demanding. Provide
a printout of the data to each student. Which units are already
known? Suggest that these first be crossed off, with the results
tabulated elsewhere. This will significantly reduce the scale of
the problem.
Key questions
Are there any obvious pieces of data with which to start?Possible extension
Extension activities are given in the question. Can students find examples for each of the units?Possible support
Create cards for a team card sorting exercise, allowing
students to move the various data around physically.
As a warm-up, you might try Choose
your units.
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