From previous post it appears that you are a young person. To take the FAA course you have to be at least 21 years of age. You cannot obtain a certificate until you reach your 23rd birthday.
Another school located in Tucson Arizona offers the program. I graduated from the school in 1999 and have been working as a dispatcher since graduation at Mesa Airlines in Phoenix Arizona.
Their website address is:
www.flightcontrolacademy.com
Good Luck