Scratch, from MIT is object-oriented programming language which is very easy to get started with as there is now a new release of the platform availble entirely in a browser; no program downloads are required. The interface is intuitive and easy to use; extensive help is available including a very clear Getting Started Guide and a set of Scratch Cards with clear instructions which will help you learn new Scratch code. Note the Scratch For Educators section.

As you can see from the sprite’s path the above program continues as follows:

Scratch square part 2

Now that’s not a very efficient program! Scratch is a great way to learn programming as well as doing some Maths! We could look at external angles of polygons for example and show how to repeat a set of instructions.

Polygons - external angles

Scratch – drawing an octagon

We could add some sound, change the pen colour or shade, learn about variables and generally have some fun!

Scratch Hmm...

Polygons - external angles version 3

Click the image then ‘See Inside’ at the top of the screen.

Try experimenting with this program which uses variables for the number of lines to draw and the angle to turn through. You will need to sign up to Scratch which is very easy and free.

It strikes me that Scratch could be used for many topics, bearings included.

Stephen Quinn’s dissertation is an investigation into using Scratch to teach KS3 Mathematics and has many ideas as well as useful information on Scratch.

Apps: Scratch Junior for iPad (for young children age 5 to 7)