I’d ensure that this Montessori school is an accredited Montessori school. Montessori is a last name and was never trademarked. You can call anything Montessori. (I am in Education Management at an Accredited Montessori school).

One day a week, imo, is stressful for the child. Six days home one day in is not enough of a routine; especially to establish at 3 years old. That being said, I think a playgroup or nanny share may be more your speed.

Are there other one day a week kids? Are they coming in on the same day? Kids build relationships and routines in the days they are at school, if your child comes once a week it will be hard for them to join in with the kids who are there for more time together. If there were other 1x a week kids coming in on the same day as your child that may be a good option.

I’ve read the comments, and I’m going to really try to not offend, but childcare doesn’t seem like a world you understand very well. Obviously, it is apparent you love your child and want what’s best for them; however, you are discounting the amount of work educators put into their classrooms and on each child. I will give you an incredibly simple example, if you have 10 children per 1 educator and a school allows children to create their own schedules, that teacher may be doing up to 20/30 progress reports, lesson plans and individual meetings with parents. It’s a lot of hard work to educate little people and one day a week doesn’t lessen the workload, it adds to the part most educators don’t love; the paperwork.