Use this animation to experiment with lotteries. Choose how many balls to match, how many are in the carousel, and how many draws to make at once.

Use Excel to explore multiplication of fractions.

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

Use Excel to practise adding and subtracting fractions.

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

An Excel spreadsheet with an investigation.

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

Use an interactive Excel spreadsheet to investigate factors and multiples.

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

Use an Excel spreadsheet to explore long multiplication.

A game for two people that can be played with pencils and paper. Combine your knowledge of coordinates with some strategic thinking.

A game for 2 players that can be played online. Players take it in turns to select a word from the 9 words given. The aim is to select all the occurrences of the same letter.

The aim of the game is to slide the green square from the top right hand corner to the bottom left hand corner in the least number of moves.

Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.

Can you put the 25 coloured tiles into the 5 x 5 square so that no column, no row and no diagonal line have tiles of the same colour in them?

A and B are two interlocking cogwheels having p teeth and q teeth respectively. One tooth on B is painted red. Find the values of p and q for which the red tooth on B contacts every gap on the. . . .

Use the Cuisenaire rods environment to investigate ratio. Can you find pairs of rods in the ratio 3:2?

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

Can you beat the computer in the challenging strategy game?

We can show that (x + 1)² = x² + 2x + 1 by considering the area of an (x + 1) by (x + 1) square. Show in a similar way that (x + 2)² = x² + 4x + 4

Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

Calculate the fractional amounts of money to match pairs of cards with the same value.

Can you find the pairs that represent the same amount of money?

Can you find a relationship between the number of dots on the circle and the number of steps that will ensure that all points are hit?

Ahmed has some wooden planks to use for three sides of a rabbit run against the shed. What quadrilaterals would he be able to make with the planks of different lengths?

A train building game for two players. Can you be the one to complete the train?

Here is a chance to play a fractions version of the classic Countdown Game.

A simple spinner that is equally likely to land on Red or Black. Useful if tossing a coin, dropping it, and rummaging about on the floor have lost their appeal. Needs a modern browser; if IE then at. . . .

The 2012 primary advent calendar features twenty-four of our posters, one for each day in the run-up to Christmas.

Train game for an adult and child. Who will be the first to make the train?

A game in which players take it in turns to choose a number. Can you block your opponent?

Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?

Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?

Practise your tables skills and try to beat your previous best score in this interactive game.

A collection of resources to support work on Factors and Multiples at Secondary level.

Practise your number bonds whilst improving your memory in this matching pairs game.

Watch this film carefully. Can you find a general rule for explaining when the dot will be this same distance from the horizontal axis?

What is the greatest number of squares you can make by overlapping three squares?

Can you match pairs of fractions, decimals and percentages, and beat your previous scores?

Here is a chance to play a version of the classic Countdown Game.

These interactive dominoes can be dragged around the screen.

This article gives you a few ideas for understanding the Got It! game and how you might find a winning strategy.

What shaped overlaps can you make with two circles which are the same size?

Mr McGregor has a magic potting shed. Overnight, the number of plants in it doubles. He'd like to put the same number of plants in each of three gardens, planting one garden each day. Can he do it?