Ontario grant money for computers?

I am the father of two ADD children (my son is in high school and has diagnosed ADD).  He goes to a private school in Toronto.

I was wondering if anyone here knows of any grant money available to my son so that he can purchase either a brand new or a used notebook/ laptop for use during his school day?  he works far faster on the keyboard than with a pencil or pen due to attention span/fine motor skills issues.

Any help would be gratefully appreciated!

thanks

- Lloyd