Dear A., unfortunately as much as I'll like to help you, I believe in this particular case I can't. I just move from living in NY city for the past nine years. I truly love Miami but I'm myself still in the process of discovering all the wonders of this beautiful city.
I'll suggest you to consider the Montessori school.
Montessori is not a system for training children in academic studies; nor is it a label to be put on educational materials. It is a revolutionary method of observing and supporting the natural development of children. Montessori educational practice helps children develop creativity, problem solving, social, and time-management skills, to contribute to society and the environment, and to become fulfilled persons in their particular time and place on Earth. The basis of Montessori practice in the classroom is respected individual choice of research and work, and uninterrupted concentration rather than group lessons led by an adult.
If your child is very active and need to be continuously mentally and physically stimulated, this approach will work great with him.
Do a search on the internet about Montessori schools in the Aventura area.
Hope this idea be of help.
Good luck and God bless.
Sincerely yours
A. sola