D.,
I just left this post for someone else seeking a great pre-school environment.
I have had my son in Tempe Montessori School since he was 18 months. The school is located off Loop 101 and Broadway. So, I think it is relatively close to you.
We love how the Montessori way focuses on respect for self, respect for others and respect for environment. In addition to academics, he is taught basic life skills.
He is 4 now and has moved onto the Primary Class. The last time I did an observation, the teacher was teaching him geography, countries in South America. You might just want to check it out: www.tempemontessori.org.
If you do end up at a Montessori School, but not TMS, I recommend you make sure it is AMI certified. www.montessori-ami.org.
Best of luck.