This interactivity invites you to make conjectures and explore probabilities of outcomes related to two independent events.

Can you work out which spinners were used to generate the frequency charts?

Identical discs are flipped in the air. You win if all of the faces show the same colour. Can you calculate the probability of winning with n discs?

Is this a fair game? How many ways are there of creating a fair game by adding odd and even numbers?

A counter is placed in the bottom right hand corner of a grid. You toss a coin and move the star according to the following rules: ... What is the probability that you end up in the top left-hand. . . .

Four cards are shuffled and placed into two piles of two. Starting with the first pile of cards - turn a card over... You win if all your cards end up in the trays before you run out of cards in. . . .

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.

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. . . .

Six balls of various colours are randomly shaken into a trianglular arrangement. What is the probability of having at least one red in the corner?

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.

7 balls are shaken in a container. You win if the two blue balls touch. What is the probability of winning?

Can you beat Piggy in this simple dice game? Can you figure out Piggy's strategy, and is there a better one?

Explore displacement/time and velocity/time graphs with this mouse motion sensor.

Euler discussed whether or not it was possible to stroll around Koenigsberg crossing each of its seven bridges exactly once. Experiment with different numbers of islands and bridges.

Meg and Mo need to hang their marbles so that they balance. Use the interactivity to experiment and find out what they need to do.

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?

Interactive game. Set your own level of challenge, practise your table skills and beat your previous best score.

This resource contains interactive problems to support work on number sequences at Key Stage 4.

This resource contains a range of problems and interactivities on the theme of coordinates in two and three dimensions.

Meg and Mo still need to hang their marbles so that they balance, but this time the constraints are different. Use the interactivity to experiment and find out what they need to do.

An environment that enables you to investigate tessellations of regular polygons

Use Excel to explore multiplication of fractions.

What is the relationship between the angle at the centre and the angles at the circumference, for angles which stand on the same arc? Can you prove it?

Can you give the coordinates of the vertices of the fifth point in the patterm on this 3D grid?

It is possible to identify a particular card out of a pack of 15 with the use of some mathematical reasoning. What is this reasoning and can it be applied to other numbers of cards?

A ladder 3m long rests against a wall with one end a short distance from its base. Between the wall and the base of a ladder is a garden storage box 1m tall and 1m high. What is the maximum distance. . . .

Learn how to use the Shuffles interactivity by running through these tutorial demonstrations.

This set of resources for teachers offers interactive environments to support work on loci at Key Stage 4.

The interactive diagram has two labelled points, A and B. It is designed to be used with the problem "Cushion Ball"

Can you locate the lost giraffe? Input coordinates to help you search and find the giraffe in the fewest guesses.

Which exact dilution ratios can you make using only 2 dilutions?

Practise your diamond mining skills and your x,y coordination in this homage to Pacman.

Match pairs of cards so that they have equivalent ratios.

Which dilutions can you make using only 10ml pipettes?

An Excel spreadsheet with an investigation.

Use Excel to practise adding and subtracting fractions.

Can you spot the similarities between this game and other games you know? The aim is to choose 3 numbers that total 15.

Use an interactive Excel spreadsheet to investigate factors and multiples.

A java applet that takes you through the steps needed to solve a Diophantine equation of the form Px+Qy=1 using Euclid's algorithm.

A game for 1 person to play on screen. Practise your number bonds whilst improving your memory

This game challenges you to locate hidden triangles in The White Box by firing rays and observing where the rays exit the Box.

Mo has left, but Meg is still experimenting. Use the interactivity to help you find out how she can alter her pouch of marbles and still keep the two pouches balanced.

A collection of our favourite pictorial problems, one for each day of Advent.

How many different triangles can you make which consist of the centre point and two of the points on the edge? Can you work out each of their angles?

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

Use an Excel spreadsheet to explore long multiplication.

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

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

Can you break down this conversion process into logical steps?