iPhone app Colour Tiles by mathies download it using MyAndroid.

Use colour tiles to represent numbers, ratios and percents.
Explore patterns and measurement.
Create geometric designs.

Mathematical Concepts:

Create visual representations that help explore mathematical thinking related to:

Exploring number patterns and concepts

Representing, comparing and ordering numbers, ratios and percents

Skip counting by 2s, 5s and 10s

Demonstrating multiplicative thinking

Using anchor values of 2, 5, and 10

Modeling operations with numbers

Exploring rectangular areas and perimeters

Investigating transformations including: reflections, rotations and translations

Features:

Select a tile or set of tiles by drawing a marquee around them

Copy, create mirror images, rotate or change the colour of selected tiles

Change the size of tiles

Use the multiplier button to set the number of tiles (1, 2, 5, 10, 100) to drag to the workspace

Use the Tile Count button (#) to check to see how many of each colour of tile are in the workspace

Step through a history of your work with the undo/redo buttons

Communicate your thinking or highlight various features of your representation using the built-in annotation tool

Insert background images,

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