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