A simple file for the Interactive whiteboard or PC screen, demonstrating equivalent fractions.

Use an interactive Excel spreadsheet to investigate factors and multiples.

Use Excel to practise adding and subtracting fractions.

Use an interactive Excel spreadsheet to explore number in this exciting game!

Use Excel to investigate the effect of translations around a number grid.

Use an Excel to investigate division. Explore the relationships between the process elements using an interactive spreadsheet.

A group of interactive resources to support work on percentages Key Stage 4.

An Excel spreadsheet with an investigation.

Use an Excel spreadsheet to explore long multiplication.

Find the frequency distribution for ordinary English, and use it to help you crack the code.

Use Excel to explore multiplication of fractions.

A plastic funnel is used to pour liquids through narrow apertures. What shape funnel would use the least amount of plastic to manufacture for any specific volume ?

What day of the week were you born on? Do you know? Here's a way to find out.

A fire-fighter needs to fill a bucket of water from the river and take it to a fire. What is the best point on the river bank for the fire-fighter to fill the bucket ?.

An aluminium can contains 330 ml of cola. If the can's diameter is 6 cm what is the can's height?

What does this number mean ? Which order of 1, 2, 3 and 4 makes the highest value ? Which makes the lowest ?

Take any pair of numbers, say 9 and 14. Take the larger number, fourteen, and count up in 14s. Then divide each of those values by the 9, and look at the remainders.

Euler found four whole numbers such that the sum of any two of the numbers is a perfect square. Three of the numbers that he found are a = 18530, b=65570, c=45986. Find the fourth number, x. You. . . .

Learn how to use composite bar charts in Excel.

This investigation uses Excel to optimise a characteristic of interest.

How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed?

Your school has been left a million pounds in the will of an ex- pupil. What model of investment and spending would you use in order to ensure the best return on the money?

If a sum invested gains 10% each year how long before it has doubled its value?

Learn how to use increment buttons and scroll bars to create interactive Excel resources.

Substitute -1, -2 or -3, into an algebraic expression and you'll get three results. Is it possible to tell in advance which of those three will be the largest ?

Take ten sticks in heaps any way you like. Make a new heap using one from each of the heaps. By repeating that process could the arrangement 7 - 1 - 1 - 1 ever turn up, except by starting with it?

How much peel does an apple have?

However did we manage before calculators? Is there an efficient way to do a square root if you have to do the work yourself?

Use Farey sequences to obtain rational approximations to irrational numbers.

It's like 'Peaches Today, Peaches Tomorrow' but interestingly generalized.

The heptathlon is an athletics competition consisting of 7 events. Can you make sense of the scoring system in order to advise a heptathlete on the best way to reach her target?

By tossing a coin one of three princes is chosen to be the next King of Randomia. Does each prince have an equal chance of taking the throne?

With access to weather station data, what interesting questions can you investigate?

Learn how to use conditional formatting to create attractive interactive spreadsheets in Excel.

The diagram illustrates the formula: 1 + 3 + 5 + ... + (2n - 1) = n² Use the diagram to show that any odd number is the difference of two squares.

This spreadsheet highlights multiples of numbers up to 20 in Pascal's triangle. What patterns can you see?

Use Excel to investigate digit sums of multiples of three. Can you explain your findings?

Use Excel to investigate remainders and divisors. Was your result predictable?

Learn how to use the Excel functions LCM and GCD.

Learn how to use advanced pasting techniques to create interactive spreadsheets.

Use Excel to find sets of three numbers so that the sum of the squares of the first two is equal to the square of the third.

I have an unlimited supply of planks, of lengths 7 and 9 units. Putting planks end to end, what total lengths can be achieved? Use Excel to investigate.

When is 7^n + 3^n a multiple of 10? Use Excel to investigate, and try to explain what you find out.

If you take two integers and look at the difference between the square of each value, there is a nice relationship between the original numbers and that difference. Can you find the pattern using. . . .

A number of useful techniques that can extend your use of Excel.

Choose four numbers and make two fractions. Use an Excel spreadsheet to investigate their properties. Can you generalise?

Learn how to use logic tests to create interactive resources using Excel.

Learn how to use Excel to create triangular arrays.