Hi A.,
Montessori is the best way to go. I started my son in montessori when he was 3 and he left when it was time to start Kindergarten in public school. He has exceled in every way possible. By age 4 he could read, do multiplication, name all of the continents, play piano ( he can read music). I could go on and on but hear are a few things they do differntly.
The child is given choices on what activity they would like to do. Evreything is tactile. When the child is finished with an activity, thay have to roll up their mat and put everything back in it's place. Everything should be neat and tidy in the classroom. the teacher/child ratio should be no more than 1/15. They should also have additional calsses like PE, music, Spanish and computer lab.
The best advice I can give you is to set up an appointment to visit a school. You should be allowed to sit in in a class with out your child. The next step is for your child to visit with a teacher and explore the classroom.
Where do you live? I live in Kingwood and tried two differnt Montessori schools. My favorite is Pines Montessori. the teachers and staff realy care for the children. The money you spend on a montessori education is an investment for a great head start for your child.