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

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. . . .

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

Which dilutions can you make using only 10ml pipettes?

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

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

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?

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

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

How would you go about estimating populations of dolphins?

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

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

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?

Which units would you choose best to fit these situations?

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

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

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

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

Get some practice using big and small numbers in chemistry.

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

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

Examine these estimates. Do they sound about right?

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

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

Explore the relationship between resistance and temperature

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

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

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 physical contexts.

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

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

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

What shape would fit your pens and pencils best? How can you make it?

Use trigonometry to determine whether solar eclipses on earth can be perfect.

An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?

Work out the numerical values for these physical quantities.

Water freezes at 0°Celsius (32°Fahrenheit) and boils at 100°C (212°Fahrenheit). Is there a temperature at which Celsius and Fahrenheit readings are the same?

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

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

Can Jo make a gym bag for her trainers from the piece of fabric she has?

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