Short science videos on solids, liquids and and gases by scientist John Murrell.  Originally designed as an experimental video for primary school teachers to show in the classroom, this video may also be of benefit to primary school teachers in terms of thinking about new ways to teach states of matter topics in an interactive manner.

Dry Ice and Wet Ice	Electrical Conduction	Flexibility, Elasticity, Heat Conduction	Full Video of States of Matter Workshop
Hardness and Summary	Heat Conduction Continued	Measuring Temperature	Scales, Colour Changes With Temperature, Boiling and Melting
Some Materials Do Not Have Liquid Form	Temperature and States of Matter	Volume Changes with Temperature	What is Matter? Solids, Liquids and Gases
Why Does Ice Float?