Demonstration can be defined as an act of showing that something exists or is true by giving proof or evidence.
It is a practical exhibition and explanation of how something works or is performed.
In a college classroom it is very difficult to demonstrate each and every concept due to lack of time and resources.
ICT can play a key role in this as demonstrations conducted in one place can be shown in classrooms all over the world through webcasts and virtual classrooms.
Moreover these demonstrations can be recorded and used time and again by students and teachers.
You can go on this U tube link and see how effectively the properties of caesium are demonstrated.
Education revolution 