You're going to get a lot of disparate answers (already have) because Montessori is a method that is applied *differently* in different locations.
We have montessori k12 in our area (as well as k8, k6, and preschool+k).
In looking for preschools for my son I visited over FIFTY montessori accredited schools and they ALL did things a bit differently. In looking at the upper level schools, the trend holds. They all do things a bit differently.
Some have required subjects every day, others every week, others every quarter. Some have monthly, quarterly, or yearly themes, some don't. Some have homework every day, some don't, and some it's optional (as in one can work from home but it's not required). Most require logs. Most have the student work at their own pace (aka may do 1 year's worth of english in a year, but 4 years worth of maths, 3 years worth of sciences, etc. The student works as quickly through the areas as they like, or take as much time as they need).
In my favorite one in the area, it would probably be a great fit for your daughter. In another one, not so much.
I would start by visiting the school itself. If there's an opening, most will either allow your daughter come for 3 days to a week to try it out or require it as part of the admissions process.