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

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

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

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

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

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

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

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?

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

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

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

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

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

Examine these estimates. Do they sound about right?

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

Get some practice using big and small numbers in chemistry.

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

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

Explore the relationship between resistance and temperature

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

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?

How would you go about estimating populations of dolphins?

Which units would you choose best to fit these situations?

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

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?

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

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

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. . . .

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

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

Which dilutions can you make using only 10ml pipettes?

Learn about the link between logical arguments and electronic circuits. Investigate the logical connectives by making and testing your own circuits and fill in the blanks in truth tables to record. . . .

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.

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

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

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

Which countries have the most naturally athletic populations?

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

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?