## Dominoes

An interactive whiteboard resource to support any investigations using dominoes. In particular this resource was created to support classroom use of puzzles included in a book by Henry Ernest Dudeney in 1917. Books this old are in the public domain and so their contents can be distributed and built upon freely.

Instructions
http://www.teacherled.com/2008/06/24/dominos/

Printable Dominoes
http://www.teacherled.com/resources/domino/dominosheet1.pdf

## Particle Maths

Thirty particles fall from above. Use the repelling particle to nudge them into the correct box depending on whether they contain a square number or a prime number. This game is addictive - three thumbs up!

## Cell Phone Maths

This resource attempts to emulate a cell phone calculator. The teacher can demonstrate how to use the simple calculators to do useful real world maths. At the moment 2 types of real world questions can be generated by the resource: percentage discounts and area.

## Isometric Shapes

Isometric Shape Draw
Use this teaching resource to demonstrate the representation of 3D shapes using isometric paper.

Isometric Shape Exploder
This resource demonstrates isometric shapes and enables classroom discussion about the number of small cubes in each shape. After discussing the shape it can be exploded to show its components. It can also be toggled to rotate. There are 7 isometric shapes to consider.

## Cuboid Exploder

This interactive whiteboard resource is useful for demonstrating the volume of cubes and cuboids.

## Elapsed Time Line

There are 2 clocks with minute and hour hands that can be dragged to set a ‘from’ and a ‘to’ time. The time line shows whole hours and 15 minute intervals. You can annotate directly to this using the built in annotation. Using these tools you can demonstrate how to use a time line to calculate how much time there is between 2 given times.

## Rep-Tiles

Rep-Tiles are tiles of a particular shape such that duplicates of a shape can be combined to form a larger version of the same shape. The website has 7 different Rep-Tiles to choose from.

Instructions
http://www.teacherled.com/2009/01/19/rep-tiles/

Worksheet, so students can solve the puzzles at their desks
http://www.teacherled.com/resources/reptile/reptiles.pdf

## Translation Plotter

Click on one of the shape buttons to the right of the grid to display the corresponding shape in a random position. A set of instructions for translating this shape will also appear in the blue box. Drag and drop the four circular markers to the translated position of the shape’s corners. If they are placed in the correct position the translated shape will be drawn on the screen.

## Slider Puzzle Maths

Two challenging puzzles.

Here is the blurb:
http://www.teacherled.com/2008/11/11/slide-puzzle-maths/

Here is the multiplication tables puzzle: