And if I am changing from a Pre-School Montessori to a regular Montessori then should I still consider advancing her a grade?
no if she is going into another montessori...then keep her at her normal grade level.
I am sorry...I didnt read through the entire thread. I assumed that you were putting her in a public first grade. As long as she is in montessori...keep her at grade level. Just be sure to research the school and make sure they are a REAL certified montessori school. Legally here in the US can add Montessori to the name of any school....that doesnt mean they are certified.
if not montessori....I advise either skip a grade or put her in GT.