Números hasta el 99

Math twister

Looking for resources for children to learn Mathematics, I thought: if the language of Mathematics is almost universal, why can not we use all kinds of resources on the web, in English, in our Mathematics classes?
To answer this question, I started searching the web and these are some I've seen.
As always, I hope you like it.
I know my English is potatonic. Wouldn't you help me to improve it? If it so e-mail me to soydeparis@hotmail.com