Hi Ali,
The links from the previous replier should give you schools to check out int
the german part of Switzerland where you're probably looking.
here's one thing I wanted to point out to you:
"why only one day a week"?
if you're familiat with the montessori approach it becomes evident that
it's not an hardly pushed academic program where kids ar filled with
facts and figures. but rather a gentle way to develop their natual
potential to the fullest.
I don't even know if a school would take your child for only a day but
you could do 3 half days at the minimum I would think. We have found
that it is a bit too disruptive if a chld goes only one day a week. They
will take longer to get aclimated. of course a great deal depends on the
school and the child. But in essence you should have your child potty trained
by the time they go to school.
Here:
http://montessorimadeeasy.com you can download a book on how
to pick your Montessori school. This teacher, Isabelle Etter works at a brand
new and beautiful bilingual (french & english) Montessori school in Rolle,
near the lake Geneva (ch-montessori.ch)
Hope this helps and thanks for considering Montessori for your child.
Warmest regards,
Yves Baggi