Using ICT to support mathematics in primary schools

Sorting triangles

This is a simple sorting program.

The screen shows a non-intersecting Venn diagram labelled triangles and other shapes, and ten 2D shapes, five of them triangles.

The object is to place each shape in the correct section of the Venn diagram.

The user moves the mouse until it is over a shape – the cursor changes to a hand.

When the cursor has changed to a hand the user can drag the shape and place it in part of the Venn diagram by clicking and holding the left mouse button. Releasing the left mouse button will drop the shape.

All the triangles have been correctly placed.

All other shapes have been correctly placed.

If the shape is placed in the wrong part of the Venn diagram it will pop back out.

This screen appears when the user has placed all the shapes correctly.

Clicking on this button repeats the activity.

This button should be clicked after each user has successfully completed the game.

To exit the program


Click on ‘File’ at the top left of the toolbar then click on ‘Close’


Click on the ‘X’ at the top right of the screen.

© 2001 - The National Numeracy Strategy