Just one of the many example (of our [so called] public education) were the expression

"Think backwards and everything will be cleare to you!"

is demostrated.

{youtube}PfNlKECWMeo{/youtube}

 

A different way of doing math at a much faster speed than those that they teach you in School. Its slow in the beginning but get very interesting when it comes to multiplications and squaring beginning part 3 ~ part 5.