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

Formulate and investigate a simple mathematical model for the design of a table mat.

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

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

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

Examine these estimates. Do they sound about right?

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

Which countries have the most naturally athletic populations?

How would you design the tiering of seats in a stadium so that all spectators have a good view?

Get some practice using big and small numbers in chemistry.

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

Use the computer to model an epidemic. Try out public health policies to control the spread of the epidemic, to minimise the number of sick days and deaths.

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

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?

Which dilutions can you make using only 10ml pipettes?

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

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

Where should runners start the 200m race so that they have all run the same distance by the finish?

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

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

Which units would you choose best to fit these situations?

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

How would you go about estimating populations of dolphins?

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

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

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. . . .

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?

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

Can you work out which processes are represented by the graphs?

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

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?

Starting with two basic vector steps, which destinations can you reach on a vector walk?

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

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

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

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

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

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

Explore the relationship between resistance and temperature