Michael Schoch, Answers questions on Noodle
You can read about the admissions process at Christ Classical Academy on its admissions page. I couldn't find information on the school's policy towards international students, but if you call it at (850) 656-2373 you should be able to get a more specific answer.
These resources should get you pointed in the right direction, but if you have any trouble finding an answer to your question feel free to ask a follow up! Good luck!