Good quality, appropriate physics experiments and investigations are the key to enhanced learning, and clarification and consolidation of theory. This website is for teachers of physics in schools and colleges. It provides a collection of experiments that demonstrate a wide range of physical concepts and processes. Some of the experiments can be used as starting-points for investigations or for enhancement activities. Many have links to carefully selected further reading and all include information and guidance for technicians. Physics is a practical science. Practical activities are not just motivational and fun: they can also sharpen students' powers of observation, stimulate questions, and help develop new understanding and vocabulary. Practical Physics is part of a group of sites that include Practical Chemistry and Practical Biology.