Symmetry: using iPad and iPhone

Some students asked today about applications for the iPad and iPhone that will help them practise symmetry at home. Check out SketchBook Express (for iPad) and SketchBook Express Mobile (for iPhone and iPod Touch). Both are free, and can be found in the iTunes store. They take a few minutes to learn. They allow you to draw symmetrical shapes, copy and transform layers to check for lines of symmetry, and draw in various colours.