I have seen some unbelievable videos on YouTube about this.It` amazing what can be achieved through this method
[ame="http://www.youtube.com/watch?v=s-EKxq1oTPw&feature=related"]YouTube - UCMAS Abacus Mental Arithmetic Audio Visual[/ame]
[ame="http://www.youtube.com/watch?v=a5yxOYZ-1XA&feature=related"]YouTube - Japanese Abacus Math School, Beaverton OR.[/ame]
George
Aviation for Kids