Hello Jackson,
The academy's name was Liberty Academy, in Illinois. It is a religious school, therefore one of the subjects was religion, and my wife wanted it ti be that way.
My wife was the facilitator and the books and other materials came over the mail, but some work was done over the internet as well.
My children had some freedom of studying time, but had to accomplish a certain volume of work every day, sometimes in the studying room we set up, sometimes by the swimming pool.
As for the results, my youngest boy had finished 6th grade when we returned to the US, in the middle of te school year. In January he was registered and tested at the new school in California, and the principal placed him in the second semester of the 8th grade. One month later he was the top student in his class.
I have no regrets at all, and the cost was not even near what the American School charges in São Paulo.