Mathematical Demonstrations

Welcome to interactive mathematics teaching resources section.Below are the current set of activities with a brief description, click a launch button to start one.

Once launched you can access further information by clicking the info icon which is located in the top menu bar. Most activities also have video instructions, click the video icon if present to view.

New activities and improvements are made regularly so remember to check back for updates.

clock screenshot
A clock

Time, Angles & Fractions

This activity has many uses. Display the current time in analogue or digital format. The clock hands can be dragged to show different times.

The clock can also demonstrate angles and has been updated for fractions and percentages too.

fraction wall screenshot
The fraction wall

Fraction Wall

This activity can be used to explore equivalence between fractions, decimals, and percentages.

Fractions are represented by layers of bricks which can be turned on or off. It is easy to show why, for example, one half is equal to two-quarters or four-eighths.

two clocks screenshot
Two Clocks

Two Clocks

This clock activity is great for teaching about time problems. The first clock shows the start time, while the second clock shows the end time. 

The duration between the times can be automatically calculated. Either clock or the duration can be hidden.

basic angles screenshot
Protractor to measure

Basic Angles

Learn to recognize acute, obtuse, reflex, and right angles.

Create and investigate problems involving complementary or supplementary angles, intersecting lines, and angles at a point. Angles can be automatically displayed or measured using a protractor.

percentage fraction decimals grid screenshot
Fraction Circle or Square

Percentage Fraction Decimal Grid Updated!

Divide a square or circle into a number of parts.

The slices or rectangles can be painted various colors, and these colors then represented as either decimals, fractions, or percentages.

classroom timer screenshot
Classroom utility timer

Classroom Timer

The classroom timer is a general-purpose countdown timer for lessons. It can be used as an effective way to get a class to focus on the task at hand.

It has two modes: the 'seconds mode' for very quick tasks of less than 60 seconds, and the 'minutes mode' for longer activities of up to an hour.

random spinners screenshot
Four Spinners

Random Spinners

The spinners can be used simply to generate random numbers. Or try the built-in activities. The first game requires children to use their skills to reach a target number by adding, subtracting, or multiplying the spinner values.

More advanced activities require calculation and/or algebraic substitution using the spinner values.

polygon explorer screenshot
Octagon Interior angles

Polygon Explorer

Create and manipulate polygons. Examine how the interior and exterior angles change as the number of sides increase.

Drag vertices, use a protractor or ruler to measure angles and length properties.

times tables screenshot
Times Tables

Fish Times Tables

Learning the times tables is extremely important. This activity can quickly demonstrate any tables value.

The visual representation allows children to grasp very quickly that multiplication is commutative, i.e., 3x4 is the same as 4x3.

fractal screenshot
Sierpinski like triangle

Fractal Explorer

The fractal explorer shows how a very simple pattern, when repeated, can produce an incredible range of images, from organic tree-like structures to rigid geometric forms.

Fun to use and involves lots of mathematical concepts.


sieve of eratosthenes screenshot
Primes up to 100

Sieve of Eratosthenes

Named after the Greek Mathematician, this classic method of finding prime numbers is also great for teaching about factors and multiples.

The Visnos sieve allows for multi-colored squares, which helps in the identification of any number's prime factors.

addition subtraction facts screenshot
A Subtraction Fact

Addition & Subtraction Facts

Teaches addition and subtraction facts up to twenty using animated penguins.

The penguins jump between two icebergs to show addition facts for the given total. For subtraction facts, the penguins dive off the iceberg into the water below.

A number line represents the number facts.

starter calculate percentage decimal fraction screenshot
Percentages of two

Starter: Calculate Percent, Fraction, Decimal

A spinner creates a random number. The class then has one minute to multiply the value by percentages, fractions, or decimal values.

Makes a great lesson starter to get brains active. Also provides discussion for various ways of getting the answers.

number explorer screenshot
36 a Triangular Number

Number Explorer

Visually divide numbers and display the calculation to show the remainder, fraction, or decimal value.

Test if a number is triangular or square. Run automated tests for divisibility, factor pairs, or prime factors.

pi screenshot
π & circle area

Explore PI

This interactive demonstration shows firstly how pi relates to the circumference of a circle. This is achieved using a regular polygon approximation; the closed polygon is opened to reveal this magical number.

The area of a circle, πr2, is also explained using animated slices.