Hartismere School

An outstanding coeducational secondary school and sixth form college

The Addams Family Musical

13th to 16th March 2019
Tickets now on sale

Squaring numbers trick


Visit for more http://www.glad2teach.co.uk/fast_math...
Become Harry Potter of Mathematics.
In 5 mins reprogram your mind to calculate faster than the Calculator itself. Impress others with your super-fast mental mathematics.