If I don't have the size of cake tin specified in my recipe, will the size I do have be OK?
Can you sketch graphs to show how the height of water changes in different containers as they are filled?
Analyse these beautiful biological images and attempt to rank them in size order.
Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?
Are these estimates of physical quantities accurate?
Practice your skills of measurement and estimation using this interactive measurement tool based around fascinating images from biology.
Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
Practise your skills of proportional reasoning with this interactive haemocytometer.
Can Jo make a gym bag for her trainers from the piece of fabric she has?
How efficiently can you pack together disks?
In Fill Me Up we invited you to sketch graphs as vessels are filled with water. Can you work out the equations of the graphs?