certification to correct!

[ieasy]

Hi, Could someone correct it for me?
It's a certification that I have to give for an exchange student who is moving to the USA.

I undersigned Mr. Franko Galão Portuguese teacher at CDF school in Rio, Brazil confirm that Mr Marcio Endigo was my student during the period between February, 10 2006 until July 14 2006.

Mario was an excllent student, always punctual, active, and very friendly. He is already able to speak Portuguese.

Sincerely yours.

[Fazzu]

I think it should be:
"...during the period between February 10, 2006 to July 14, 2006."

And I would write like this:
"Mr Marcio was an excellent,active,friendly and always a punctual student.He is now able to speak Portuguese."