I'm having the same problem in the Sacramento area. No AMI or AMS certified schools, but several of the directors have AMS credentials. The school that we have chosen for our DD seems to have very loving teachers and one of the teachers and interns is attending the Montessori Teaching College here in Sac. I'm not so hung up on certification as long as they are using the correct materials and guiding the children using the Mont method. My biggest concern is how they treat my child. You really have to make appointments and physically go see the schools and meet the teachers and directress. I was shocked at how different the M schools can be (personalities, noise levels, classroom setup, etc.) Good luck!