Place value is like the secret language of numbers. If you didn't know about place value and saw the number 468, you might think it was four, six, eight, but when you know the secret language of place value you will know that the value of that number is four hundred and sixty-eight.
The following songs and games will help to build knowledge about place value.
The following link is to a site that contains a collection of place value games.
Modelling the place value of numbers using M.A.B. blocks demonstrates understanding and is a prerequisite for modelling addition and subtraction statements.
What are M.A.B blocks?
The following link to School A to Z by the Department of Education briefly explains the base ten system and how M.A.B. blocks model this. There is also a brief video demonstration.