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

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. . . .

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

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

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

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

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

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

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

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?

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

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

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

Explore the relationship between resistance and temperature

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

Which dilutions can you make using only 10ml pipettes?

What shapes should Elly cut out to make a witch's hat? How can she make a taller hat?

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

Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.

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

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

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

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

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

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.

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

Which units would you choose best to fit these situations?

The design technology curriculum requires students to be able to represent 3-dimensional objects on paper. This article introduces some of the mathematical ideas which underlie such methods.

Use your skill and judgement to match the sets of random data.

How do you write a computer program that creates the illusion of stretching elastic bands between pegs of a Geoboard? The answer contains some surprising mathematics.

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

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?

Is there a temperature at which Celsius and Fahrenheit readings are the same?

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

Get some practice using big and small numbers in chemistry.

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

Is it really greener to go on the bus, or to buy local?

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

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

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

Which countries have the most naturally athletic populations?