Two trains set off at the same time from each end of a single straight railway line. A very fast bee starts off in front of the first train and flies continuously back and forth between the. . . .

The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories?

Work with numbers big and small to estimate and calulate various quantities in biological contexts.

To investigate the relationship between the distance the ruler drops and the time taken, we need to do some mathematical modelling...

In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

Explore the relationship between resistance and temperature

Have you ever wondered what it would be like to race against Usain Bolt?

Analyse these beautiful biological images and attempt to rank them in size order.

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

Get some practice using big and small numbers in chemistry.

Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?

Can you sketch graphs to show how the height of water changes in different containers as they are filled?

Examine these estimates. Do they sound about right?

How would you go about estimating populations of dolphins?

When you change the units, do the numbers get bigger or smaller?

These Olympic quantities have been jumbled up! Can you put them back together again?

Which units would you choose best to fit these situations?

Which dilutions can you make using only 10ml pipettes?

Practice your skills of measurement and estimation using this interactive measurement tool based around fascinating images from biology.

Work with numbers big and small to estimate and calculate various quantities in biological contexts.

Simple models which help us to investigate how epidemics grow and die out.

If I don't have the size of cake tin specified in my recipe, will the size I do have be OK?

Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?

Imagine different shaped vessels being filled. Can you work out what the graphs of the water level should look like?

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 work out which processes are represented by the graphs?

Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?

Make your own pinhole camera for safe observation of the sun, and find out how it works.

Make an accurate diagram of the solar system and explore the concept of a grand conjunction.

Work out the numerical values for these physical quantities.

Andy wants to cycle from Land's End to John o'Groats. Will he be able to eat enough to keep him going?

Invent a scoring system for a 'guess the weight' competition.

Work with numbers big and small to estimate and calculate various quantities in physical contexts.

This problem explores the biology behind Rudolph's glowing red nose.

Can you deduce which Olympic athletics events are represented by the graphs?

Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?

Can you draw the height-time chart as this complicated vessel fills with water?

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

10 graphs of experimental data are given. Can you use a spreadsheet to find algebraic graphs which match them closely, and thus discover the formulae most likely to govern the underlying processes?

Various solids are lowered into a beaker of water. How does the water level rise in each case?

Investigate circuits and record your findings in this simple introduction to truth tables and logic.