New Inspector and Radon

I just launched my business, and I want to add radon testing.I see that you can take the certification on here for free, but will that make me certified, or will I still need to take the class? I live in North Carolina.

http://www.ncradon.org/Home.html

I took the NACHI course before the State of Florida required course and got the best grade in the class. The NACHI course made the state course seem easy.

Nice.