Is it really greener to go on the bus, or to buy local?
When you change the units, do the numbers get bigger or smaller?
Which units would you choose best to fit these situations?
Andy wants to cycle from Land's End to John o'Groats. Will he be able to eat enough to keep him going?
In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.
Can you choose your units so that a cube has the same numerical value for it volume, surface area and total edge length?