A right-angled isosceles triangle is rotated about the centre point of a square. What can you say about the area of the part of the square covered by the triangle as it rotates?
A metal puzzle which led to some mathematical questions.
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
There are 27 small cubes in a 3 x 3 x 3 cube, 54 faces being visible at any one time. Is it possible to reorganise these cubes so that by dipping the large cube into a pot of paint three times you. . . .
This is an interactive net of a Rubik's cube. Twists of the 3D cube become mixes of the squares on the 2D net. Have a play and see how many scrambles you can undo!
Use an Excel spreadsheet to explore long multiplication.
How good are you at estimating angles?
Show that for any triangle it is always possible to construct 3 touching circles with centres at the vertices. Is it possible to construct touching circles centred at the vertices of any polygon?
Use Excel to practise adding and subtracting fractions.
Use an interactive Excel spreadsheet to investigate factors and multiples.
A simple file for the Interactive whiteboard or PC screen, demonstrating equivalent fractions.
Use an interactive Excel spreadsheet to explore number in this exciting game!
Place a red counter in the top left corner of a 4x4 array, which is covered by 14 other smaller counters, leaving a gap in the bottom right hand corner (HOME). What is the smallest number of moves. . . .
To avoid losing think of another very well known game where the patterns of play are similar.
On the 3D grid a strange (and deadly) animal is lurking. Using the tracking system can you locate this creature as quickly as possible?
An Excel spreadsheet with an investigation.
Use Excel to investigate the effect of translations around a number grid.
Help the bee to build a stack of blocks far enough to save his friend trapped in the tower.
Can you beat the computer in the challenging strategy game?
The interactive diagram has two labelled points, A and B. It is designed to be used with the problem "Cushion Ball"
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.
P is a point on the circumference of a circle radius r which rolls, without slipping, inside a circle of radius 2r. What is the locus of P?
Can you give the coordinates of the vertices of the fifth point in the patterm on this 3D grid?
Use an Excel to investigate division. Explore the relationships between the process elements using an interactive spreadsheet.
This resource contains interactive problems to support work on number sequences at Key Stage 4.
Match pairs of cards so that they have equivalent ratios.
This resource contains a range of problems and interactivities on the theme of coordinates in two and three dimensions.
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.
This set of resources for teachers offers interactive environments to support work on loci at Key Stage 4.
Match the cards of the same value.
Use Excel to explore multiplication of fractions.
Discover a handy way to describe reorderings and solve our anagram in the process.
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?
Given the nets of 4 cubes with the faces coloured in 4 colours, build a tower so that on each vertical wall no colour is repeated, that is all 4 colours appear.
Start with any number of counters in any number of piles. 2 players take it in turns to remove any number of counters from a single pile. The winner is the player to take the last counter.
An environment that enables you to investigate tessellations of regular polygons
Can you beat Piggy in this simple dice game? Can you figure out Piggy's strategy, and is there a better one?
There are thirteen axes of rotational symmetry of a unit cube. Describe them all. What is the average length of the parts of the axes of symmetry which lie inside the cube?
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.
The classic vector racing game brought to a screen near you.
This game challenges you to locate hidden triangles in The White Box by firing rays and observing where the rays exit the Box.
A tool for generating random integers.
Here is a chance to play a fractions version of the classic Countdown Game.
A collection of our favourite pictorial problems, one for each day of Advent.
How good are you at finding the formula for a number pattern ?
An environment that simulates a protractor carrying a right- angled triangle of unit hypotenuse.
A collection of resources to support work on Factors and Multiples at Secondary level.
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. . . .
A group of interactive resources to support work on percentages Key Stage 4.
What are the areas of these triangles? What do you notice? Can you generalise to other "families" of triangles?