This post features an activity sequence based on this text:
Light can be reflected from a shiny surface like a mirror. It can be made to change direction by the shiny surface. If a ray of light passes into an object with different density - like air to water, or air to glass, the light will also change direction, but this is called refraction. The light is slowed up as it passes into something which is more dense, like air to water, just like we go slower when we try to run through shallow water. The light bends towards the normal. Light speeds up when going from water to air, (from more dense objects into less dense objects). This will refract the light away from the normal. A prism refracts light rays and splits up white light into the colours of the spectrum - red, orange, yellow, green, blue, indigo and violet.
The text was provided by a KS3 Science teacher a few years ago, along with a whole load of other texts and lists of keywords which were used in a series of TaskMagic activities (they're still available to TaskMagic3 users now from here).